| A | B |
congruent,  | same size and same shape |
parallel lines,  | lines in a plane that do not intersect |
vertex,  | the point where two sides intersect on an angle or polygon |
alternate exterior angles,  | angles on opposite sides of transversal, outside the parallel lines |
alternate interior angles,  | nonadjacent angles on opposite sides of the transversal, between the parallel lines |
corresponding angles,  | same angle, different line |
consecutive interior angles,  | angles on same side of transversal and between lines |
transversal,  | line that intersects two or more lines |
| adjacent | next to or adjoining something |
| perpendicular lines | two lines that intersect at a right angle |
| supplementary | two angles whose sum = 180 |