This document defines and describes different types of angles: a right angle is 90 degrees; an acute angle is less than 90 degrees; an obtuse angle is greater than 90 degrees but less than 180 degrees; a straight angle is 180 degrees; and a reflex angle is greater than 180 degrees but less than 360 degrees. It then asks the reader to identify what type of angle is being described from options for five different angles.

2. Right Angle
A right angle is 90⁰.

3. Acute Angle
An acute angle is less than 90⁰.

4. Obtuse Angle
An obtuse angle is more than 90⁰ and less than 180⁰.

5. Straight Angle
A straight angle is exactly 180⁰.

6. Reflex Angle
A reflex angle is greater than 180⁰ and less than 360⁰.

7. What kind of angle is this?
Obtuse Straight Reflex
Right Acute

8. What kind of angle is this?
Obtuse Straight Reflex
Acute
Right

9. What kind of angle is this?
Straight Reflex
Acute
Right Obtuse

10. What kind of angle is this?
Reflex
Acute
Right Obtuse Straight

11. What kind of angle is this?
Acute
Right Obtuse Straight Reflex