Identify Angle Pairs

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

If m∠1 = 30°, what is m∠2 if m∠1 and m∠2 are complementary?

Back

m∠2 = 60°.

Front

If m∠3 = 150°, what is m∠4 if m∠3 and m∠4 are supplementary?

Back

m∠4 = 30°.

Front

What is the value of x if the angles are complementary and one angle is 45°?

Back

x = 45°.

Front

Name a pair of complementary angles from the following: ∠A = 30°, ∠B = 60°, ∠C = 90°.

Back

∠A and ∠B are complementary.

Front

What is the relationship of the angle pair if m∠5 = 90° and m∠6 = 90°?

Back

The angle pair is complementary.

Front

If m∠7 = 120°, what is m∠8 if m∠7 and m∠8 are vertical angles?

Back

m∠8 = 120°.

Front

What is the sum of the measures of two supplementary angles?

Back

The sum is 180 degrees.