| A | B |
|---|
| right angle | A square corner that measures 90 degrees.,  |
| line | A straight path of points that goes on and on in two directions,  |
| point | An exact location in space,  |
| vertex | The point where two sides of a polygon meet.,  |
| parallel lines | Two lines that will never cross each other no matter how far they are extended.,  |
| perpendicular lines | 2 lines which make a right angle when they meet.,  |
| line segment | The part of a line between two points.,  |
| ray | The part of the line that starts at a point and extends forever in one direction.,  |
| acute angle | Less than a right angle. Less than 90 degrees.,  |
| obtuse angle | greater than a right angle,  |
| straight angle | a straight line that measures 180 degrees,  |
