Right Angle

In geometry, when two rays meet each other at a common point, they form an angle. The point of meeting of the two rays is known as the vertex.

Angles are measured in degrees (symbol: °)

Some common types of angles are acute angles, right angles, and obtuse angles.

When two straight lines intersect each other at 90˚ or are perpendicular to each other at the intersection, they form the right angle. A right angle is represented by the symbol ∟.

The given image shows various formations of the right angle.

We can find the right angles in shapes.

A square or rectangle has four corners with right angles.

Examples of right angles are all around us. We can see right angles in the corners of a room, book, cube, windows and at several other places.

A vertical and a horizontal line makes the most common right angles. However, diagonal lines intersecting each other also form right angles. If you draw the diagonals of a square, a rhombus or a kite, the angle at the intersection is 90 degrees and is, therefore, a right angle.

Angle at the intersection is 90 degrees.

Related Games

Add the Angles Game

Answer Questions Related to Triangles Game

Classify Triangles and Rectangles as Closed Shape Game

Classify Triangles Game

Draw Angles in Multiples of 10 Degrees Game

Draw Angles Nearest 5 and 1 Degrees Game

Draw Angles Using a Protractor Game

Find Right Angles Game

Find the Perimeter of the Squared and the Rectangles Game

Identify Angles by their Types Game

How to Draw a Right Angle Using A Protractor?

Start by drawing a horizontal line.

Step 1 to draw a right angle using protractor

Now place the protractor on the horizontal line.

Step 2 to draw a right angle using protractor : Protractor on the horizontal line

Measure 90˚ and mark it with a point.

Step 3 to draw a right angle using protractor : Measure 90˚

Now using a scale, draw a straight line from this point to the horizontal line.

Step 4 to draw a right angle using protractor : draw a straight line from this point to the horizontal line

Related Worksheets

$Count Sides and Angles Worksheet$

View

$Rectangles and Triangles Worksheet$

View

$Separate Out the Triangles Worksheet$

View

Fun Facts

All right angles are the same.
All right angles correspond to a quarter of a complete turn.
All triangles with one angle right are called right-angled triangles.

Solved Examples on Right Angle

Find the number of right angles in the figure shown below.

Solution: The above figure is a rectangle. The number of right angles in the above figure is 4. Each side in the figure meets the adjacent side at 90°.

If the two lines PQ and RS are perpendicular, what is the measure of ∠SOT?

Measure of ∠SOT? when pq and rs are perpendicular

Solution:

Since, line PQ ⟂ line RS, m∠SOQ=90°

Moreover, m∠SOQ=m∠QOT+m∠SOT

90°=30°+m∠SOT

Therefore, m∠SOT=90°-30°=60°

How many right angles are there in the given figure?

Solution:

The given figure shows 3 right angles and 2 obtuse angles.

Practice Problems on Right Angle

How many right angles are there in a square?

CorrectIncorrect

Correct answer is: 4
Explanation: A square contains 4 angles, and all of them measure 90°.

How many right angles are present in the given figure?

$Right Angle – Definition, Solved Examples, Facts, FAQs$

CorrectIncorrect

Correct answer is: 2
Explanation: The given figure shows a quadrilateral with two right angles.

A right-angled triangle has one angle measuring 90°. What is the sum of the measures of the other two angles?

$\lt$ 90°

$\gt$ 90°

= 90°

$\gt$ 180°

CorrectIncorrect

Correct answer is: = 90°
Explanation: The three interior angles of any triangle add up to 180°. Since one of the interior angle in a right-angled triangle is 90°, the other two interior angles must add up to 90°.