Angles

Types of Angles and Their Properties

Acute Angle

An angle that is less than 90°.

Right Angle

An angle that measures exactly 90°.

Obtuse Angle

An angle that is greater than 90° but less than 180°.

Straight Angle

An angle that measures exactly 180°.

Reflex Angle

An angle that is greater than 180° but less than 360°.

Example: Identifying Angles

Example 1: The angle between the hands of a clock at 10:10 is about 35° (Acute Angle).

Try Identifying the Angles:

Identify the type of angle from the following:

Angle 1: 120°, Angle 2: 85°, Angle 3: 180°