Parallel Line & Angle Vocabulary

Angles that are outside the parallel lines and on the same side of the transversal.

• Alternate Interior

• Alternate Exterior

• Consecutive Interior

• Consecutive Exterior

• Corresponding

Angles that are outside the parallel lines and on opposite sides of the transversal.

• Alternate Interior

• Alternate Exterior

• Consecutive Interior

• Consecutive Exterior

• Corresponding

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

• Alternate Interior

• Alternate Exterior

• Consecutive Interior

• Consecutive Exterior

• Corresponding

Angles that are inside the parallel lines and on the same side of the transversal.

• Alternate Interior

• Alternate Exterior

• Consecutive Interior

• Consecutive Exterior

• Corresponding

Angles that are in the same locations relative to the parallel lines and on the same side of the transversal.

• Alternate Interior

• Alternate Exterior

• Consecutive Interior

• Consecutive Exterior

• Corresponding

Angles across from each other where two lines intersect.

• Vertical

• Supplementary

• Parallel Lines

• Transversal

Angles that add up to 180 degrees.

• Vertical

• Supplementary

• Parallel Lines

• Transversal

Straight lines that will never intersect

• Vertical

• Supplementary

• Parallel Lines

• Transversal

Straight line that intersects two or more other lines

• Vertical

• Supplementary

• Parallel Lines

• Transversal

Alternate Interior

• are congruent (are equal)

• add up to 180 degrees