**Definition of Vertex of an Angle**

- A point at which the arms (sides) of an angle meet is known as the vertex of the angle.

**More about Vertex of an Angle**

- Measuring of angle is done about the vertex
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**Example of Vertex of an Angle**

**Solved Example on Vertex of an Angle**

Which of the following figures has D as its vertex?

A. Figure 4

B. Figure 3

C. Figure 2

D. Figure 1

**Related Terms for Vertex of an Angle**

- Angle
- Point
- Ray
- Side
- Vertex