Angle

Definition of An Angle

• An angle is formed by two rays with a common endpoint (called the vertex).

Examples of An Angle

• In the figure shown, angle AOB is formed by the rays OA and OB with a common endpoint O.

Solved Example on Angle

How many angles are formed by three rays with a common vertex?

Choices:

A. 3

B. 2

C. 1

D. 4

Correct Answer: A

Solution:

Step 1: The figure shown has three rays PQ, PR, and PS with a common vertex P.

Step 2: The angles formed by these 3 rays are QPR, RPS, and QPS.

Step 3: So, three rays can form 3 angles.

 

Related Terms for Angle

• Rays
• Endpoint
• Vertex

A