| A | B |
|---|
| middle of a circle | center |
| a polygon with 4 sides | quadrilateral |
| a quadrilateral whose opposite sides are equal | parallelogram |
| diagonal | a line segment connecting 2 vertices of a polygon that are not next to each other |
| diameter | a line segment that connects two points on a circle and passes through the center |
| radius | a line segment that connects the center of a circle to any point on the circle |
| prefix | comes before the root word |
| suffix | comes after the root word |
| root word | base word |
| congruent | figures that have the same size and shape |
