| A | B |
|---|
| PERPENDICULAR LINES | Two lines that intersect and form a right angle. |
| MIDPOINT | The point that is exactly the middle of a line segment. |
| SQUARE | A rectangle having all four sides of equal length. |
| ANGLE | The distance between two intersecting lines, measured in degrees. |
| PROTRACTOR | A device used to measure angles. |
| ACUTE ANGLE | An angle that is less than ninety degrees. |
| OBTUSE ANGLE | An angle that is more than ninety degrees. |
| POINT | A position in space. |
| SCALENE TRIANGLE | A triangle having three unequal sides and angles. |
| LINE SEGMENT | One part of a line. |
| EQUILATERAL TRIANGLE | A triangle with all three sides equal. |
| INTERSECTING LINES | Lines that meet each other at a point. |
| RULER | A device used to measure how many inches or centimeters something is. |
| RIGHT ANGLE | An angle that is ninety degrees. |
| PARALLEL LINES | Two lines that are equidistant from each other at every point. |
| DEGREE | Unit used to measure the size of an angle. |
| RECTANGLE | A quadrilateral with opposite sides parallel. |
| VERTEX | The intersection point of two sides. |
| LINE | A continuous extent of length. |
