| A | B |
|---|
| GEOMETRY | The study of space and figures in space |
| LINE | The set of ALL the points along a path in a plane |
| LINE SEGMENT | Part of a line consisting of a path between TWO endpoints |
| MIDPOINT | A point that divides a line segment into two congruent parts |
| ANGLE | A figure formed by two rays having a common endpoint |
| ACUTE ANGLE | measures less than 90 degrees |
| RIGHT ANGLE | measures 90 degree |
| OBTUSE ANGLE | measures more than 90 but less than 180 degrees |
| STRAIGHT ANGLE | measures 180 degrees |
| CONGRUENT | of equal size or measure |
| DIAGONAL | a line segment joining two NON ADJACENT vertices in a polygon |
| RAY | A portion of a line extending from one endpoint indefinitely in one direction |
| PROTRACTOR | a tools for measuring angles |
| COMPASS | a tool for drawing circles |
| A PLANE FIGURE | a set of ALL points in the same plane enclosing a region |
| POINT | an exact location in space |
| SEGMENT | two point and all points between them |
| VERTEX | a common endpoint of two rays that form an angle. |
| PERPENDICULAR LINES | two lines in the same plane that intersect at right angles |
| PARALLEL LINES | lines in the same plane that do not intersect |
| COMPLEMENTARY ANGLES | two angles whose measures added TOGETHER = 90 degrees |
| SUPPLEMENTARY ANGLES | two angles whose measure added TOGETHER = 180 degrees |
| CONGRUENT ANGLES | angles that have the same measure |
