Pairs of Angles

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 and are equal.

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are adjacent angles?

Back

Angles that share a common side and vertex.

Front

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

Back

110°.

Front

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

Back

60°.

Front

Find the missing angle. Find x: ∠A + ∠B = 180°, ∠A = 60°.

Back

120°.

Front

Find the missing angle. Find x: ∠1 + ∠2 = 90°, ∠1 = 45°.

Back

45°.

Front

If two angles are vertical angles and one measures 50°, what is the measure of the other angle?

Back

50°.

Front

If ∠3 and ∠4 are vertical angles, and ∠3 = 120°, what is ∠4?

Back

120°.