Angle Relationships

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What is an example of a pair of complementary angles?

Back

81° and 9°.

Front

What angle pair is formed when two lines intersect and are opposite each other?

Back

Vertical Angles.

Front

Which angles share a common vertex and a common side?

Back

Adjacent Angles.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What is an example of a pair of supplementary angles?

Back

100° and 80°.

Front

What are alternate interior angles?

Back

Angles that are on opposite sides of a transversal and inside the two lines.

Front

What are corresponding angles?

Back

Angles that are in the same position on two parallel lines cut by a transversal.

Front

If two angles are vertical angles, what can you say about their measures?

Back

They are equal.

Front

What is the sum of the measures of complementary angles?

Back

90°.