Angles

Angle is formed between two rays with a common end point.

The common end point is called vertex of the angle

and the rays are called arms of the angle.

How do we name the angle?

Suppose the angle is

We can call it

  ∠ B

     Or

  ∠ ABC   

Symbol of angle → ∠

Interior and Exterior of an angle

Let us take the angle

Example

X, Y is in interior of ∠ABC

Z is on  ∠ABC

P, Q is in exterior of  ∠ABC