### ‘Angle Basics’ and ‘Naming Angles’

**Tags:**Free Worksheet PDF on Angle basics for class IV, Lesson on Naming angles for class 4, Vertex, Arms, Angles, Exterior of an angle, Interior of an angle, Angle basics and naming angle worksheet PDF, Angle basics and naming angle practice page, Quiz on angle basics and naming angle, Angle is formed when two rays or two line segments are joined with a common end point. Vertex: Common end point where two arms meet is called vertex of an angle. Arms: Two rays or line segments forming an angle are called arms. We can name angle as angle XYZ or angle Y.### ‘Angle Basics’ and ‘Naming Angles’

#### Angle Basics

Angle is formed when two rays or two line segments are joined with a common end point.

__Vertex:__Common end point where two arms meet is called vertex of an angle.__Arms:__Two rays or line segments forming an angle are called arms.#### Naming Angles

We can name angle as angle XYZ or angle Y. We use symbol to denote an angle.

So, we can writeNote:

We use capital letters to name an angle.

Letter in the middle denote the vertex of an angle.

We can also use number in place of alphabet to name an angle.

#### Interior and Exterior of an angle

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