| collinear | points that lie on the same line |
| complementary angles | two angles whose sum measures 90 degrees |
| coplanar | any three or more points that lie in the same plane |
| line | an infinite number of points that goes on forever in both directions |
| perpendicular | lines that intersect to form right angles |
| ray | an infinite set of points that starts at a point and goes on forever |
| right angle | an angle formed by two perpendicular lines, the measure of which is 90 degrees |
| vertex | the point of intersection of the two rays that form the sides of the angle |
Drag corresponding items onto each other to make them disappear.
Start Game