Special Angle Pairs

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

What are adjacent angles?

Back

Angles that share a common side and vertex.

Front

What is the sum of the angles in a triangle?

Back

180°.

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

What is the relationship between angles that are congruent?

Back

They have equal measures.

Front

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

Back

45°.

Front

What is the definition of a linear pair of angles?

Back

A pair of adjacent angles that are formed when two lines intersect.