Parallel Lines Cut by a Transversal Vocabulary

Front

Two angles whose sum is 90 degrees

Back

Complementary

Front

Two angles whose sum is 180 degrees

Back

Supplementary

Front

Lines that do NOT intersect

Back

Parallel

Front

Angles that are in the same location on different lines

Back

Corresponding

Front

Nonadjacent interior angles that lie on opposite sides of the transversal

Back

Alternate Interior Angles

Front

Alternate exterior angles

Back

Angles that lie outside a pair of lines and on opposite sides of a transversal.

Front

Two inside angles on the same side of the transversal are known as...

Back

Same Side Interior Angles

Front

Same side exterior angles

Back

Two outside angles on the same side of the transversal

Front

Interior

Back

Inside

Front

Exterior

Back

Outside