Properties of Angle Pairs

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What is the value of x if two angles are complementary and one angle measures 30 degrees?

Back

60 degrees.

Front

What is the value of x if two angles are supplementary and one angle measures 110 degrees?

Back

70 degrees.

Front

What is the equation for finding the measure of an angle if it is known to be supplementary to 146 degrees?

Back

x + 146 = 180.

Front

What is the equation for finding the measure of an angle if it is known to be complementary to 19 degrees?

Back

x + 19 = 90.

Front

If angle A and angle B are complementary and angle A measures 40 degrees, what is the measure of angle B?

Back

50 degrees.

Front

If angle C and angle D are supplementary and angle C measures 130 degrees, what is the measure of angle D?

Back

50 degrees.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal.

Front

What is the relationship between adjacent angles?

Back

Adjacent angles share a common side and vertex.