| A | B |
|---|
| Polygon | A straight-sided closed figure |
| Triangle | A three-sided polygon |
| Octagon | An eight-sided polygon |
| Square | A rectangle with all sides the same length |
| Parallelogram | A quadrilateral that has opposite sides equal in length |
| Quadrilateral | A four-sided polygon |
| Rhombus | A parallelogram with all sides the same length |
| Trapezoid | A figure with only one pair of parallel sides |
| Plane figures | figures that lie on a flat surface |
| Area | The measure of a region, expressed in square units |
| Perimeter | The distance around a figure |
| Right angle | a 90 degree angle |
| Acute angle | An angle less than 90 degrees |
| obtuse angle | An angle more than 90 degrees |
| Angle | The point where two lines meet |
| Face | The flat surface of a solid |
| Edge | The intersection of two faces |
| Vertex | The intersection of three or more faces |
| Cylinder | A geometric solid that has a circle for a face, and two faces |
| Congruent figures | Figures that have the same size and shape |
