**What is Right-Angle?**

In geometry, when two rays meet each at a common point, they form an angle. The point of meeting of 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.

**Right angle**

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 make 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.

Example of a rhombus and a kite with diagonals intersecting at a right angle.

**How to draw a right angle using a protractor?**

**1**. Start by drawing a horizontal line.

**2**. Now place the protractor on the horizontal line.

**3**. Measure 90˚ and mark it with a point.

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

Fun Facts 1. All right angles are the same. 2. All right angles correspond to quarter of a complete turn. 3. All triangles with one angle right are called right-angled triangles. |