Angle Relationships Worksheet

Angle Relationships

Read each question carefully and answer to the best of your ability. Show all your work where applicable.

1. Two angles are complementary if their sum is:

2. What type of angles are ∠A and ∠B in the diagram below?

3. Angles that share a common vertex and a common side are called   angles.

4. If two angles are supplementary, their sum is   degrees.

5. When two lines intersect, the angles opposite each other are called   angles and are equal in measure.

6. Angle X measures 65 degrees. What is the measure of its complementary angle?

7. Two angles form a linear pair. One angle measures 110 degrees. What is the measure of the other angle?

8. All adjacent angles are complementary.

9. Vertical angles are always equal in measure.

10. In the diagram below, if ∠1 = 40°, find the measures of ∠2, ∠3, and ∠4.