How to Name an Angle in Four Ways

Math Lessons >
Naming Angles

It's time we closely examined an angle.

No matter how many angles are there in a diagram, each angle has its own unique name. We use the symbol '∠' followed by the name to represent an angle. The below links have more on how you can label an angle and in how many different ways you can accomplish this task.

1. Label an angle using the vertex and a point from each arm

2. Label an angle using only the vertex

3. Label an angle using numbers

Label an angle using the vertex and a point from each arm

Naming an angle using three points

∠ABC or ∠CBA

Note:

The vertex should go between the two points.

Label an angle using only the vertex

Naming an angle using vertex

∠B

Note:

When two or more angles share the same vertex, we don't use only the vertex to name the angles.

Label an angle using numbers

Naming an angle using numbers

∠1

Note:

Certain lower-case letters of the English alphabet like a, b, and c, and Greek letters like alpha (α), beta (β), gamma (γ), and theta (θ) are also used to represent angles.

Solved Examples

1. Name this angle.

Four different ways of naming an angle