9 terms

complementary angles

two or more angles that add up to 90 degrees

supplementary angles

two or more angles that add up to 180 degrees

vertical angles

a pair of non-adjacent angles formed when two lines intersect. They share a vertex but not common rays.

adjacent

have a common side and a vertex but no common interior points

vertex

common endpoint

Transversal

a line that intersects two or more other lines to form eight or more angles.

Alternate Exterior Angles

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

Alternate Interior Angles

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

Corresponding Angles

angles that are at the same location at each intersection on the figure.