Complementary, Supplementary and Vertical Angles

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

If ∠A and ∠B are supplementary, and the measure of ∠A is 120°, what is the measure of ∠B?

Back

60°.

Front

What is an example of a pair of complementary angles?

Back

81° and 9°.

Front

Find the value of x if x + 43° = 180°.

Back

x = 137°.

Front

Find the value of x if x + 104° = 180°.

Back

x = 76°.

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

If two angles are vertical angles, what can be said about their measures?

Back

They are equal.

Front

What is the relationship between supplementary angles?

Back

They add up to 180°.

Front

If ∠C is 30°, what is the measure of its supplementary angle?

Back

150°.

Front

If ∠D is 70°, what is the measure of its complementary angle?

Back

20°.