angle
rays
linear pair
vertical angles
vertex
complementary angles
supplementary angles
1. A pair of rays that have a common endpoint and do not lie on the same
line.
2. Two angles whose non-common sides formed a straight line and no
interior points in common.
3. Two angles whose sum of their measures is 180°.
4. Two angles whose sum of their measures is 90°.
5. Two nonadjacent angles formed by two intersecting lines.​