angle relationships

Front

What are complementary angles?

Back

Two angles that add up to 90°.

Front

What are supplementary angles?

Back

Two angles that add up to 180°.

Front

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect.

Front

What is the relationship between vertical angles?

Back

Vertical angles are congruent.

Front

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

Back

65°.

Front

If two angles are supplementary and one angle measures 75°, what is the measure of the other angle?

Back

105°.

Front

What are adjacent angles?

Back

Angles that share a common side and vertex.

Front

What is the sum of the measures of angles in a triangle?

Back

180°.

Front

If m∠1 = 40° and m∠2 is its complement, what is m∠2?

Back

50°.

Front

If m∠3 = 90° and m∠4 is its supplement, what is m∠4?

Back

90°.