{"id":1726,"date":"2022-04-22T06:28:36","date_gmt":"2022-04-22T06:28:36","guid":{"rendered":"https:\/\/www.splashlearn.com\/article-test-new\/?page_id=1726"},"modified":"2024-02-18T15:54:38","modified_gmt":"2024-02-18T15:54:38","slug":"plane-definition-with-examples","status":"publish","type":"post","link":"https:\/\/www.splashlearn.com\/math-vocabulary\/geometry\/plane","title":{"rendered":"Plane Geometry &#8211; Definition With Examples"},"content":{"rendered":"\n<div class=\"wp-block-columns eplus-wrapper is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column eplus-wrapper is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\tMath-Vocabulary\n<\/span><\/div>\n\n<div class=\"ub_table-of-contents\" data-showtext=\"show\" data-hidetext=\"hide\" data-scrolltype=\"auto\" id=\"ub_table-of-contents-eac418d4-e909-4000-8d88-d7bbe0574c0d\" data-initiallyhideonmobile=\"false\"\n                    data-initiallyshow=\"true\"><div class=\"ub_table-of-contents-extra-container\"><div class=\"ub_table-of-contents-container ub_table-of-contents-1-column \"><ul><li><a href=https:\/\/www.splashlearn.com\/math-vocabulary\/geometry\/plane#0-what-is-plane-geometry>What is Plane Geometry?<\/a><\/li><li><a href=https:\/\/www.splashlearn.com\/math-vocabulary\/geometry\/plane#1-how-to-identify-a-plane-in-geometry>How to Identify a Plane in Geometry?<\/a><\/li><li><a href=https:\/\/www.splashlearn.com\/math-vocabulary\/geometry\/plane#6-types-of-angles>Types of Angles<\/a><\/li><li><a href=https:\/\/www.splashlearn.com\/math-vocabulary\/geometry\/plane#10-solved-examples>Solved Examples<\/a><\/li><li><a href=https:\/\/www.splashlearn.com\/math-vocabulary\/geometry\/plane#11-practice-problems>Practice Problems<\/a><\/li><li><a href=https:\/\/www.splashlearn.com\/math-vocabulary\/geometry\/plane#12-frequently-asked-questions>Frequently Asked Questions<\/a><\/li><\/ul><\/div><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading eplus-wrapper\" id=\"0-what-is-plane-geometry\">What is Plane Geometry?<\/h2>\n\n\n\n<p class=\"eplus-wrapper\">Plane geometry deals in flat shapes that you can draw on a piece of paper, such as squares, circles, and triangles. Solid geometry deals in three-dimensional solid shapes that exist around us, such as spheres, cones, and cubes.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">Suppose you have to draw Earth on a piece of paper. How would you do that? A simple way would be to draw a circle to represent the planet. The Earth you draw will have a flat shape. But the Earth we live on isn\u2019t a flat object. It has a spherical shape.&nbsp;<\/p>\n\n\n\n<p class=\"eplus-wrapper\">The branch of mathematics that deals with the shapes, sizes, dimensions, and angles of objects is known as geometry. It is broadly divided into two types: plane geometry and solid geometry.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">Today, we shall explore the definition of plane geometry and more. Let\u2019s dive in right away!<\/p>\n\n\n\n<div id=\"recommended-games-container-id\" class=\"recommended-games-container\"><h4 class=\"recommended-games-container-headline\">Recommended Games<\/h4><div class=\"recommended-games-container-slides\"><div class=\"game-card-container-outer\">\r\n\t<a href=\"https:\/\/www.splashlearn.com\/s\/math-games\/plot-multiple-points-on-coordinate-planes\" data-vars-ga-category=\"splashlearn_vocab\" data-vars-ga-action=\"games_recommendations\" data-vars-ga-label=\"post_widget\">\r\n\t\t<div class=\"game-card-container-inner-block\">\r\n\t\t\t<img decoding=\"async\" class=\"game-card-container-inner-img\" src=\"https:\/\/cdn.splashmath.com\/curriculum_uploads\/images\/playables\/coordinate_plot_pts_on_graph_pt.png\" alt=\"Plot Multiple Points on Coordinate Planes Game\">\r\n\t\t<\/div>\r\n\t\r\n\t\t<div class=\"game-card-container-inner\">\r\n\t\t\t<div class=\"game-card-container-inner-name\">Plot Multiple Points on Coordinate Planes Game<\/div>\r\n\t\t\t<span class=\"game-card-container-inner-cta\">Play<\/span>\r\n\t\t<\/div>\r\n\t<\/a>\r\n<\/div><div class=\"game-card-container-outer\">\r\n\t<a href=\"https:\/\/www.splashlearn.com\/s\/math-games\/spot-the-error-on-coordinate-planes\" data-vars-ga-category=\"splashlearn_vocab\" data-vars-ga-action=\"games_recommendations\" data-vars-ga-label=\"post_widget\">\r\n\t\t<div class=\"game-card-container-inner-block\">\r\n\t\t\t<img decoding=\"async\" class=\"game-card-container-inner-img\" src=\"https:\/\/cdn.splashmath.com\/curriculum_uploads\/images\/playables\/coordinate_find_mistake_pt.png\" alt=\"Spot the Error on Coordinate Planes Game\">\r\n\t\t<\/div>\r\n\t\r\n\t\t<div class=\"game-card-container-inner\">\r\n\t\t\t<div class=\"game-card-container-inner-name\">Spot the Error on Coordinate Planes Game<\/div>\r\n\t\t\t<span class=\"game-card-container-inner-cta\">Play<\/span>\r\n\t\t<\/div>\r\n\t<\/a>\r\n<\/div><\/div><p class=\"recommended-games-container-desc\"><a href=\"https:\/\/www.splashlearn.com\/games\">More Games<\/a><\/p><button class=\"scroll-right-arrow\"><\/button><\/div><script type=\"text\/javascript\">\n        document.addEventListener(\"DOMContentLoaded\", function() {\n            const container = document.querySelector(\"#recommended-games-container-id\");\n            const slidesContainer = container.querySelector(\".recommended-games-container-slides\");\n            const cards = slidesContainer.querySelectorAll(\".game-card-container-outer\");\n            const scrollRightArrow = container.querySelector(\".scroll-right-arrow\");\n\n            function adjustContainerStyles() {\n                const numCards = cards.length;\n\n                if (numCards === 1) {\n                    container.style.maxWidth = \"30%\";\n                    container.style.textAlign = \"center\";\n                } else if (numCards === 2) {\n                    container.style.maxWidth = \"50%\";\n                    container.style.textAlign = \"center\";\n                } else if (numCards === 3) {\n                    container.style.maxWidth = \"75%\";\n                    container.style.textAlign = \"center\";\n                } else {\n                    container.style.maxWidth = \"\";\n                    container.style.textAlign = \"\";\n                }\n            }\n\n            function checkScrollPosition() {\n                const maxScrollLeft = slidesContainer.scrollWidth - slidesContainer.clientWidth;\n                if ((slidesContainer.scrollLeft + 10) >= maxScrollLeft) {\n                    scrollRightArrow.style.display = \"none\"; \/\/ Hide the arrow if fully scrolled\n                } else {\n                    scrollRightArrow.style.display = \"block\"; \/\/ Show the arrow if not fully scrolled\n                }\n            }\n\n            scrollRightArrow.addEventListener(\"click\", function() {\n                const scrollAmount = 300; \/\/ Adjust based on the container's width and your needs\n                slidesContainer.scrollLeft += scrollAmount;\n                setTimeout(checkScrollPosition, 100); \/\/ Delay to allow scroll update\n            });\n\n            adjustContainerStyles();\n            checkScrollPosition();\n            slidesContainer.addEventListener(\"scroll\", checkScrollPosition);\n        });\n    <\/script><h2 class=\"wp-block-heading eplus-wrapper\" id=\"1-how-to-identify-a-plane-in-geometry\">How to Identify a Plane in Geometry?<\/h2>\n\n\n\n<p class=\"eplus-wrapper\">In geometry, a plane is a flat surface of two dimensions. It extends endlessly and has no thickness. You can think of a piece of paper or the surface of a wall as a part of a geometric plane.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full eplus-wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"285\" src=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/examples-of-planes-in-real-life.png\" alt=\"Examples of Planes in Real Life\" class=\"wp-image-40072\" title=\"Examples of Planes in Real Life\" srcset=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/examples-of-planes-in-real-life.png 620w, https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/examples-of-planes-in-real-life-300x138.png 300w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/figure>\n\n\n\n<p class=\"eplus-wrapper\">The flat shapes in plane geometry are known as plane figures. We can measure them by their length and height or length and width. But they don&#8217;t have any depth.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"eplus-wrapper\">Some common examples of plane figures are lines, rectangles, circles, and triangles.&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full eplus-wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"280\" src=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/plane-figure.png\" alt=\"Plane Figure\" class=\"wp-image-40073\" title=\"Plane Figure\" srcset=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/plane-figure.png 620w, https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/plane-figure-300x135.png 300w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/figure>\n\n\n\n<div id=\"recommended-worksheets-container-id\" class=\"recommended-games-container\"><h4 class=\"recommended-games-container-headline\">Recommended Worksheets<\/h4><div class=\"recommended-games-container-slides\"><div class=\"worksheet-card-container-outer\">\r\n\t<a href=\"https:\/\/www.splashlearn.com\/s\/math-worksheets\/make-an-airplane-using-shapes\" data-vars-ga-category=\"splashlearn_vocab\" data-vars-ga-action=\"worksheets_recommendations\" data-vars-ga-label=\"post_widget\">\r\n\t    <div class=\"worksheet-card-container-inner-block\">\r\n\t        <img decoding=\"async\" class=\"worksheet-card-container-inner-img\" src=\"https:\/\/cdn.splashmath.com\/cms_assets\/s\/math-worksheets\/make-an-airplane-using-shapes.jpeg\" alt=\"Make an Airplane using Shapes Worksheet\">\r\n\t    <\/div>\r\n\t\t<div class=\"worksheet-card-container-inner\" >\r\n\t\t<\/div><\/a>\r\n<\/div><\/div><p class=\"recommended-games-container-desc\"><a href=\"https:\/\/www.splashlearn.com\/worksheets\">More Worksheets<\/a><\/p><button class=\"scroll-right-arrow\"><\/button><\/div><script type=\"text\/javascript\">\n        document.addEventListener(\"DOMContentLoaded\", function() {\n            const container = document.querySelector(\"#recommended-worksheets-container-id\");\n            const slidesContainer = container.querySelector(\".recommended-games-container-slides\");\n            const cards = slidesContainer.querySelectorAll(\".worksheet-card-container-outer\");\n            const scrollRightArrow = container.querySelector(\".scroll-right-arrow\");\n\n            function adjustContainerStyles() {\n                const numCards = cards.length;\n\n                if (numCards === 1) {\n                    container.style.maxWidth = \"30%\";\n                    container.style.textAlign = \"center\";\n                } else if (numCards === 2) {\n                    container.style.maxWidth = \"50%\";\n                    container.style.textAlign = \"center\";\n                } else if (numCards === 3) {\n                    container.style.maxWidth = \"75%\";\n                    container.style.textAlign = \"center\";\n                } else {\n                    container.style.maxWidth = \"\";\n                    container.style.textAlign = \"\";\n                }\n            }\n\n            function checkScrollPosition() {\n                const maxScrollLeft = slidesContainer.scrollWidth - slidesContainer.clientWidth;\n                if ((slidesContainer.scrollLeft + 10) >= maxScrollLeft) {\n                    scrollRightArrow.style.display = \"none\"; \/\/ Hide the arrow if fully scrolled\n                } else {\n                    scrollRightArrow.style.display = \"block\"; \/\/ Show the arrow if not fully scrolled\n                }\n            }\n\n            scrollRightArrow.addEventListener(\"click\", function() {\n                const scrollAmount = 300; \/\/ Adjust based on the container's width and your needs\n                slidesContainer.scrollLeft += scrollAmount;\n                setTimeout(checkScrollPosition, 100); \/\/ Delay to allow scroll update\n            });\n\n            adjustContainerStyles();\n            checkScrollPosition();\n            slidesContainer.addEventListener(\"scroll\", checkScrollPosition);\n        });\n    <\/script><h2 class=\"wp-block-heading eplus-wrapper\" id=\"2-basic-terminologies-in-plane-geometry\">Basic Terminologies in Plane Geometry<\/h2>\n\n\n\n<p class=\"eplus-wrapper\">When it comes to plane geometry, we need to know about a few terminologies, such as:<\/p>\n\n\n\n<ul class=\"eplus-wrapper wp-block-list\">\n<li class=\"eplus-wrapper\">Point<\/li>\n\n\n\n<li class=\"eplus-wrapper\">Line<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading eplus-wrapper\" id=\"3-what-is-a-point\">What Is a Point?<\/h3>\n\n\n\n<p class=\"eplus-wrapper\">A point denotes an exact location on a plane. It gives us a position, but it has no dimension.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">Usually, a dot is used to represent a point. A point often has a name, such as &#8220;A&#8221;, &#8220;B&#8221;, &#8220;C&#8221;, etc.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full eplus-wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"622\" height=\"336\" src=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/points-a-b-and-c.png\" alt=\"Points A, B and C\" class=\"wp-image-40074\" title=\"Points A, B and C\" srcset=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/points-a-b-and-c.png 622w, https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/points-a-b-and-c-300x162.png 300w\" sizes=\"auto, (max-width: 622px) 100vw, 622px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading eplus-wrapper\" id=\"4-what-is-a-line\">What Is a Line?<\/h3>\n\n\n\n<p class=\"eplus-wrapper\">A line is a one-dimensional straight figure. It forms when countless points combine. It has no thickness and extends limitlessly in both directions. We can&#8217;t measure its length. A line is represented by two arrows at each end to indicate that it extends endlessly in both directions.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">You might have come across the terms, \u201cline segment\u201d and \u201cray\u201d. They are both parts of a line.&nbsp;<\/p>\n\n\n\n<p class=\"eplus-wrapper\">Line Segment: A line segment has two defined endpoints. We can measure its length. An example of a line segment is the edge of a paper sheet. A line segment is represented by a line with no arrows at either end.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">Ray: A ray has a defined starting point, but it has no endpoint and can extend endlessly in one direction. We can&#8217;t measure its length. A ray is represented by a line with a single arrow at one end to indicate that it extends endlessly in one direction. An example of a ray is a sun ray.&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full eplus-wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"358\" src=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/line-line-segment-and-ray.png\" alt=\"Line, Line Segment and Ray\" class=\"wp-image-40075\" title=\"Line, Line Segment and Ray\" srcset=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/line-line-segment-and-ray.png 620w, https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/line-line-segment-and-ray-300x173.png 300w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/figure>\n\n\n\n<p class=\"eplus-wrapper\">Fun Fact: The Greek mathematician Euclid defined line as a \u201cbreadthless length\u201d.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading eplus-wrapper\" id=\"5-angles-in-plane-geometry\">Angles in Plane Geometry<\/h2>\n\n\n\n<p class=\"eplus-wrapper\">What is common between the edge of a table, an arrowhead, and a slice of pizza? They are all examples of angles we see around us.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">An angle forms when two rays meet at an endpoint. The rays are the sides of an angle, while the common endpoint is the vertex.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">Angles are measured in degrees (\u00b0).&nbsp;&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full eplus-wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"764\" src=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/formation-of-an-angle.png\" alt=\"Formation of an Angle\" class=\"wp-image-40076\" title=\"Formation of an Angle\" srcset=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/formation-of-an-angle.png 620w, https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/formation-of-an-angle-243x300.png 243w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading eplus-wrapper\" id=\"6-types-of-angles\">Types of Angles<\/h2>\n\n\n\n<p class=\"eplus-wrapper\">Acute Angle: An acute angle (or sharp angle) measures between 0\u00b0 and 90\u00b0.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">Right Angle: A right angle measures 90\u00b0.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">Obtuse Angle: An obtuse angle measures between 90\u00b0 to 180\u00b0.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">Straight Angle: A straight angle measures 180\u00b0.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">Reflex Angle: A reflex angle measures between 180\u00b0 to 360\u00b0.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">Complete Angle: A complete angle measures 360\u00b0.&nbsp;&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full eplus-wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"475\" src=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/different-types-of-angles.png\" alt=\"Different Types of Angles\" class=\"wp-image-40077\" title=\"Different Types of Angles\" srcset=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/different-types-of-angles.png 620w, https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/different-types-of-angles-300x230.png 300w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading eplus-wrapper\" id=\"7-plane-geometry-examples\">Plane Geometry Examples<\/h2>\n\n\n\n<p class=\"eplus-wrapper\"><strong>Polygon<\/strong><\/p>\n\n\n\n<p class=\"eplus-wrapper\">A polygon is a closed shape formed by straight line segments. It is a two-dimensional figure with a finite number of sides.&nbsp;<\/p>\n\n\n\n<p class=\"eplus-wrapper\">The sides form the edges of a polygon. The meeting point of the two sides is known as a vertex.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">A polygon is named depending on its number of sides. It is usually denoted by n-gon, where n is the number of sides. Every polygon has 3 or more sides.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">A few examples of polygons are triangles, squares, and rectangles.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full eplus-wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"590\" src=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/different-types-of-polygons.png\" alt=\"Different Types of Polygons\" class=\"wp-image-40078\" title=\"Different Types of Polygons\" srcset=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/different-types-of-polygons.png 620w, https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/different-types-of-polygons-300x285.png 300w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading eplus-wrapper\" id=\"8-circle-in-geometry\">Circle in Geometry<\/h2>\n\n\n\n<p class=\"eplus-wrapper\">A circle is a closed round figure without any edges or corners. It is a two-dimensional curved shape.<\/p>\n\n\n\n<p class=\"eplus-wrapper\">The word circle comes from the Greek word <em>kirkos<\/em>, which means ring or hoop.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"eplus-wrapper\">The distances between the center of the circle and every point on the circle are the same. This distance is the radius of the circle.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full eplus-wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"413\" src=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/parts-of-a-circle.png\" alt=\"Parts of a Circle\" class=\"wp-image-40079\" title=\"Parts of a Circle\" srcset=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/parts-of-a-circle.png 620w, https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/parts-of-a-circle-300x200.png 300w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/figure>\n\n\n\n<p class=\"eplus-wrapper\">Fun Fact: <em>Flatland<\/em> is a fictional story by Edwin Abbott, in which he speculates what it would be like to live in a two-dimensional world (a plane). Think for a while about what changes it will bring to your world if such a thing happens!<\/p>\n\n\n\n<h2 class=\"wp-block-heading eplus-wrapper\" id=\"9-conclusion\">Conclusion<\/h2>\n\n\n\n<p class=\"eplus-wrapper\">Knowledge of plane geometry is essential for measuring lines, angles, and surfaces. It lays the foundation for learning solid geometry.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading eplus-wrapper\" id=\"10-solved-examples\">Solved Examples<\/h2>\n\n\n\n<p class=\"eplus-wrapper\"><strong>Example 1: Is the figure below a line or a line segment?<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full eplus-wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"390\" src=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/line-segment-ab.png\" alt=\"Line Segment AB\" class=\"wp-image-40080\" title=\"Line Segment AB\" srcset=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/line-segment-ab.png 620w, https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/line-segment-ab-300x189.png 300w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/figure>\n\n\n\n<p class=\"eplus-wrapper\"><strong>Solution<\/strong>: The given figure is a line. Even though it has two defined points A and B, the two arrows indicate that it extends endlessly in both directions. This shows it is a line.<\/p>\n\n\n\n<p class=\"eplus-wrapper\"><strong>Example 2: Which of the following figures is not a polygon?<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full eplus-wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"619\" height=\"443\" src=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/mcq-on-polygon.png\" alt=\"MCQ on Polygon\" class=\"wp-image-40081\" title=\"MCQ on Polygon\" srcset=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/mcq-on-polygon.png 619w, https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/mcq-on-polygon-300x215.png 300w\" sizes=\"auto, (max-width: 619px) 100vw, 619px\" \/><\/figure>\n\n\n\n<p class=\"eplus-wrapper\"><strong>Solution<\/strong>: Fig: d is not a polygon. It is a curved shape, and polygons are formed by straight line segments.<\/p>\n\n\n\n<p class=\"eplus-wrapper\"><strong>Example 3: Identify the obtuse angles in the following intersection of lines.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full eplus-wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"375\" src=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/intersection-of-lines-solution.png\" alt=\"Intersection of Lines Solution: Here, \u2220CDE and \u2220GDH are the two obtuse\" class=\"wp-image-40082\" title=\"Intersection of Lines\" srcset=\"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/intersection-of-lines-solution.png 620w, https:\/\/www.splashlearn.com\/math-vocabulary\/wp-content\/uploads\/2024\/02\/intersection-of-lines-solution-300x181.png 300w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/figure>\n\n\n\n<p class=\"eplus-wrapper\">Intersection of Lines<strong>Solution<\/strong>: Here, \u2220CDE and \u2220GDH are the two obtuse angles. They are greater than 90\u00b0 but less than 180\u00b0.<\/p>\n\n\n\n<h2 class=\"wp-block-heading eplus-wrapper\" id=\"11-practice-problems\">Practice Problems<\/h2>\n\n\n\n<p class=\"eplus-wrapper\"><div class=\"spq_wrapper\"><h2 style=\"display:none;\">Plane Geometry - Definition With Examples<\/h2><p style=\"display:none;\">Attend this Quiz & Test your knowledge.<\/p><div class=\"spq_question_wrapper\" data-answer=\"2\"><span class=\"spq_question_header\"><span class=\"sqp_question_number\">1<\/span><h3 class=\"sqp_question_text\">Which of the following is an incorrect statement?<\/h3><\/span><div class=\"spq_answer_block\" data-value=\"0\">A geometric plane is a two-dimensional surface.<\/div><div class=\"spq_answer_block\" data-value=\"1\">A geometric plane extends endlessly.<\/div><div class=\"spq_answer_block\" data-value=\"2\">A geometric plane has thickness.<\/div><div class=\"spq_answer_block\" data-value=\"3\">A line is an example of a plane figure.<\/div><div class=\"sqp_question_hint\"><div class=\"sqp_question_hint__header\"><span class=\"spq_correct\">Correct<\/span><span class=\"spq_incorrect\">Incorrect<\/span><\/div><div class=\"sqp_question_hint__content\"><span>Correct answer is: A geometric plane has thickness.<br\/>In geometry, a plane doesn't have any thickness.<\/span><\/div><\/div><\/div><div class=\"spq_question_wrapper\" data-answer=\"3\"><span class=\"spq_question_header\"><span class=\"sqp_question_number\">2<\/span><h3 class=\"sqp_question_text\">How many dimensions does a point have?<\/h3><\/span><div class=\"spq_answer_block\" data-value=\"0\">Three<\/div><div class=\"spq_answer_block\" data-value=\"1\">One<\/div><div class=\"spq_answer_block\" data-value=\"2\">Two<\/div><div class=\"spq_answer_block\" data-value=\"3\">Zero<\/div><div class=\"sqp_question_hint\"><div class=\"sqp_question_hint__header\"><span class=\"spq_correct\">Correct<\/span><span class=\"spq_incorrect\">Incorrect<\/span><\/div><div class=\"sqp_question_hint__content\"><span>Correct answer is: Zero<br\/>A point has no dimension.<\/span><\/div><\/div><\/div><div class=\"spq_question_wrapper\" data-answer=\"1\"><span class=\"spq_question_header\"><span class=\"sqp_question_number\">3<\/span><h3 class=\"sqp_question_text\">Which of the following is a reflex angle?<\/h3><\/span><div class=\"spq_answer_block\" data-value=\"0\">45\u00b0<\/div><div class=\"spq_answer_block\" data-value=\"1\">265\u00b0<\/div><div class=\"spq_answer_block\" data-value=\"2\">180\u00b0<\/div><div class=\"spq_answer_block\" data-value=\"3\">110\u00b0<\/div><div class=\"sqp_question_hint\"><div class=\"sqp_question_hint__header\"><span class=\"spq_correct\">Correct<\/span><span class=\"spq_incorrect\">Incorrect<\/span><\/div><div class=\"sqp_question_hint__content\"><span>Correct answer is: 265\u00b0<br\/>Reflex angles measure between 180\u00b0 and 360\u00b0.<\/span><\/div><\/div><\/div><\/div>  <script type=\"application\/ld+json\">{\n        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many dimensions does a point have?\",\n                    \"comment\": {\n                      \"@type\": \"Comment\",\n                      \"text\": \"A point has no dimension.\"\n                    },\n                    \"encodingFormat\": \"text\/html\",\n                    \"suggestedAnswer\": [ {\n                                \"@type\": \"Answer\",\n                                \"position\": 0,\n                                \"encodingFormat\": \"text\/html\",\n                                \"text\": \"Three\",\n                                \"comment\": {\n                                    \"@type\": \"Comment\",\n                                    \"text\": \"A point has no dimension.\"\n                                    }\n                                }, {\n                                \"@type\": \"Answer\",\n                                \"position\": 1,\n                                \"encodingFormat\": \"text\/html\",\n                      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\"encodingFormat\": \"text\/html\",\n                    \"suggestedAnswer\": [ {\n                                \"@type\": \"Answer\",\n                                \"position\": 0,\n                                \"encodingFormat\": \"text\/html\",\n                                \"text\": \"45\u00b0\",\n                                \"comment\": {\n                                    \"@type\": \"Comment\",\n                                    \"text\": \"Reflex angles measure between 180\u00b0 and 360\u00b0.\"\n                                    }\n                                }, {\n                                \"@type\": \"Answer\",\n                                \"position\": 2,\n                                \"encodingFormat\": \"text\/html\",\n                                \"text\": \"180\u00b0\",\n                                \"comment\": {\n                                    \"@type\": \"Comment\",\n                                    \"text\": \"Reflex angles measure between 180\u00b0 and 360\u00b0.\"\n                                    }\n                                }, {\n                                \"@type\": \"Answer\",\n                                \"position\": 3,\n                                \"encodingFormat\": \"text\/html\",\n                                \"text\": \"110\u00b0\",\n                                \"comment\": {\n                                    \"@type\": \"Comment\",\n                                    \"text\": \"Reflex angles measure between 180\u00b0 and 360\u00b0.\"\n                                    }\n                                }],\n                    \"acceptedAnswer\": {\n                      \"@type\": \"Answer\",\n                      \"position\": 1,\n                      \"encodingFormat\": \"text\/html\",\n                      \"text\": \"265\u00b0\",\n                      \"comment\": {\n                          \"@type\": \"Comment\",\n                          \"text\": \"Reflex angles measure between 180\u00b0 and 360\u00b0.\"\n                        },\n                      \"answerExplanation\": {\n                        \"@type\": \"Comment\",\n                        \"text\": \"Reflex angles measure between 180\u00b0 and 360\u00b0.\"\n                      }\n                    } \n\n                    }]}<\/script><\/p>\n\n\n\n<h2 class=\"wp-block-heading eplus-wrapper\" id=\"12-frequently-asked-questions\">Frequently Asked Questions<\/h2>\n\n\n<div class=\"wp-block-ub-content-toggle\" id=\"ub-content-toggle-a40cb93e-b93a-4b70-aec4-023416de038b\" data-mobilecollapse=\"true\" data-desktopcollapse=\"true\">\n<div class=\"wp-block-ub-content-toggle-accordion\">\n                <div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" aria-expanded=\"false\" aria-controls=\"ub-content-toggle-panel-0-a40cb93e-b93a-4b70-aec4-023416de038b\" tabindex=\"0\">\n                    <p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-a40cb93e-b93a-4b70-aec4-023416de038b\"><span id=\"docs-internal-guid-5105b550-7fff-3c02-7e07-d0ca7685bd40\"><span style=\"font-size: 12.5pt; font-family: Roboto, sans-serif; background-color: transparent; font-weight: 700; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline;\">Are all 2D shapes polygons?<\/span><\/span><\/p><div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span>\n                    <\/div><\/div><div role=\"region\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-0-a40cb93e-b93a-4b70-aec4-023416de038b\">\n\n<p>No, all 2D shapes aren&#8217;t polygons. For example, a circle is a 2D figure, but it&#8217;s not a polygon.<\/p>\n\n<\/div><\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\">\n                <div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" aria-expanded=\"false\" aria-controls=\"ub-content-toggle-panel-1-a40cb93e-b93a-4b70-aec4-023416de038b\" tabindex=\"0\">\n                    <p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-a40cb93e-b93a-4b70-aec4-023416de038b\"><strong>How many points can make up a plane?<\/strong><\/p><div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span>\n                    <\/div><\/div><div role=\"region\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-1-a40cb93e-b93a-4b70-aec4-023416de038b\">\n\n<p>Any three points not in a straight line can make up a plane.<\/p>\n\n<\/div><\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\">\n                <div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" aria-expanded=\"false\" aria-controls=\"ub-content-toggle-panel-2-a40cb93e-b93a-4b70-aec4-023416de038b\" tabindex=\"0\">\n                    <p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-a40cb93e-b93a-4b70-aec4-023416de038b\"><strong>What is a regular polygon?<\/strong><\/p><div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span>\n                    <\/div><\/div><div role=\"region\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-2-a40cb93e-b93a-4b70-aec4-023416de038b\">\n\n<p>A regular polygon has equal sides and angles.<\/p>\n\n<\/div><\/div>\n<\/div><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>What is Plane Geometry? Plane geometry deals in flat shapes that you can draw on a piece of paper, such as squares, circles, and triangles. Solid geometry deals in three-dimensional solid shapes that exist around us, such as spheres, cones, and cubes. Suppose you have to draw Earth on a piece of paper. How would &#8230; <a title=\"Plane Geometry &#8211; Definition With Examples\" class=\"read-more\" href=\"https:\/\/www.splashlearn.com\/math-vocabulary\/geometry\/plane\" aria-label=\"More on Plane Geometry &#8211; Definition With Examples\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ub_ctt_via":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-1726","post","type-post","status-publish","format-standard","hentry","category-all"],"featured_image_src":null,"author_info":{"display_name":"Mithun Jhawar","author_link":"https:\/\/www.splashlearn.com\/math-vocabulary\/author\/mithun-jhawarsplashlearn-com\/"},"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-json\/wp\/v2\/posts\/1726","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-json\/wp\/v2\/comments?post=1726"}],"version-history":[{"count":21,"href":"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-json\/wp\/v2\/posts\/1726\/revisions"}],"predecessor-version":[{"id":40083,"href":"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-json\/wp\/v2\/posts\/1726\/revisions\/40083"}],"wp:attachment":[{"href":"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-json\/wp\/v2\/media?parent=1726"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-json\/wp\/v2\/categories?post=1726"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.splashlearn.com\/math-vocabulary\/wp-json\/wp\/v2\/tags?post=1726"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}