Parallel Lines and Transversals

Vertical Angles

Angles that are ACROSS from each other and are formed by any intersecting lines.

Interior Angles

Angles that are between the two parallel lines

Corresponding Angles

Angles that lie on the same side of the transversal and on the same side of the parallel lines. Angles on the same corner.

Congruent

Having the same measurement.

Consecutive [Same-Side] Interior Angles

Angles between the parallel lines and on the same side of the transversal

Alternate Interior Angles

Angles between the parallel lines, but on opposite sides of the transversal (make a Z shape)

Linear Pairs

Angles next to each other that add up to 180 (make a line)

Alternate Exterior Angles

Angles on the outside of the parallel lines and on the opposite side of the transversal

Consecutive [Same-Side] Exterior Angles

Angles on the outside of the parallel lines but on the same side of the transversal

Exterior Angles

Angles on the outsides of the parallel lines

Supplementary Angles

Two angles that add to 180 degrees

Parallel Lines

Two lines that never intersect

Transversal

a line that intersects two or more lines to create pairs of congruent and supplementary angles.