1
a segment, ray, line, or plane that intersects a segment at its midpoint
2
a ray that divides an angle into two congruent angles
3
Two angles whose sum is 180 degrees
4
Two angles whose sum is 90 degrees
5
A pair of adjacent angles whose noncommon sides are opposite rays.
6
Same size and shape
7
Points that lie on the same line
8
A point that divides a segment into two congruent segments
9
A pair of opposite congruent angles formed by intersecting lines
10
Lines in a plane that never intersect
