Geometry Review

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal in measure.

Front

What is the sum of complementary angles?

Back

The sum of complementary angles is 90 degrees.

Front

What is the sum of supplementary angles?

Back

The sum of supplementary angles is 180 degrees.

Front

If ∠2 is 83°, what is the measure of ∠3 if they are supplementary?

Back

∠3 = 97°.

Front

Back

x = 3.

Front

Back

x = -3.

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex but do not overlap.

Front

What is the measure of an angle that is complementary to 72°?

Back

18°.

Front

What is the measure of an angle that is supplementary to 72°?

Back

108°.

Front

What is the definition of a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.