Supplementary, Complementary, and Vertical Angles

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect and are always congruent (equal measures).

Front

If the measure of ∠2 is 83°, what is the measure of ∠3?

Back

97°.

Front

What is the complement angle to 30°?

Back

60°.

Front

If two angles are supplementary, what is the sum of their measures?

Back

180°.

Front

If two angles are complementary, what is the sum of their measures?

Back

90°.

Front

What is the relationship between vertical angles?

Back

Vertical angles are congruent (equal measures).

Front

If ∠A and ∠B are supplementary and ∠A measures 70°, what is the measure of ∠B?

Back

110°.

Front

If ∠C and ∠D are complementary and ∠C measures 45°, what is the measure of ∠D?

Back

45°.