two angles that share a side and a vertex

2 congruent angles on the outside of parallel lines and opposite sides of the transversal.

2 congruent angles on the inside of parallel lines and opposite sides of the transversal.

2 adjacent angles whose measures add up to 90 degrees.

when a transversal intersects parallel lines corresponding angles are in the same position on each parallel line, they are congruent.

2 straight lines with the same slope but different intercepts that never intersect

2 angles on the same side of the transversal but outside of the parallel lines their sum is 180 degrees

2 angles on the same side of the transversal but inside of the parallel lines their sum is 180 degrees.

An angle whose measure is 180 degrees and forms a straight line.

2 angles that may or may not be adjacent whose sum is 180 degrees.

a straight line that intersects more than 1 line; when the transversal cuts 2 parallel lines certain congruent angles are formed.

the point where lines meet and an angle is formed.

congruent angles that are formed when 2 lines intersect, they are diagonal from each other and share a vertex