Angle Relationships

Front

What is the measure of a right angle?

Back

90 degrees

Front

What is the definition of complementary angles?

Back

Two angles that measure 90 degrees.

Front

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

Back

180 degrees.

Front

What is the measure of the missing angle if one angle is 30° and they are complementary?

Back

60°.

Front

What do you call two angles that add up to 180 degrees?

Back

Supplementary angles.

Front

If ∠A is 45° and ∠B is its complement, what is the measure of ∠B?

Back

45°.

Front

What is the definition of a straight angle?

Back

An angle that measures 180 degrees.

Front

If ∠C and ∠D are supplementary and ∠C measures 110°, what is the measure of ∠D?

Back

70°.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal.

Front

If two angles are complementary, and one angle measures 25°, what is the other angle?

Back

65°.