1. Angle
Measurements

2. Degrees: Measuring Angles
We measure the size of an angle using degrees.
Example: Here are some examples of angles and
their degree measurements.

3. Protractor
A device used to measure angles.

4. Acute Angles
An acute angle is an angle measuring between 0 and 90 degrees.
Example:
                                                               

5. Obtuse Angles Example:
An obtuse angle is an angle measuring between 90 and 180 degrees.
Example:
                                                                 

6. Reflex Angles
An reflex angle is an angle measuring between 180 and 360 degrees.

7. Right Angles
A right angle is an angle measuring 90 degrees.
Examples:
                                      

8. Review State whether the following are acute, right, or obtuse. 1. 3.5.
acute
obtuse
right 2. 4. ?
acute
obtuse ?