Complementary,Supplementary, Vertical Angles

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect.

Front

If ∠A + ∠B = 90°, what can we say about ∠A and ∠B?

Back

They are complementary angles.

Front

If ∠C + ∠D = 180°, what can we say about ∠C and ∠D?

Back

They are supplementary angles.

Front

If ∠1 = 45°, what is the measure of its complementary angle?

Back

45° (because 90° - 45° = 45°).

Front

If ∠2 = 120°, what is the measure of its supplementary angle?

Back

60° (because 180° - 120° = 60°).

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal.

Front

If two angles are supplementary and one angle measures 70°, what is the measure of the other angle?

Back

110° (because 180° - 70° = 110°).

Front

If two angles are complementary and one angle measures 30°, what is the measure of the other angle?

Back

60° (because 90° - 30° = 60°).