| A | B |
|---|
| square | a quadrilateral with 4 equal sides and 4 right angles |
| rectangle | a quadrilateral with 2 sets of parallel lines and 4 right angles |
| parallelogram | a quadrilateral with 2 sets of parallel sides |
| trapezoid | a quadrilateral with 1 set of parallel sides |
| rhombus | a quadrilateral with 2 sets of parallel sides and all sides equal length |
| scalene | a triangle with no equal sides |
| isosceles | a triangle with 2 equal sides |
| equilateral | a triangle with 3 equal sides and 3 equal angles |
| triangle | a polygon with 3 sides |
| quadrilateral | a polygon with 4 sides |
| pentagon | a 5-sided polygon |
| hexagon | a 6-sided polygon |
| septagon | a 7-sided polygon |
| octagon | an 8-sided polygon |
| decagon | a 10-sided polygon |
| regular polygon | a polygon with all sides and all angles equal |
| congruent | figures that are exactly the same size and shape |
| similar | figures that are the same shape and proportion, but not the same size |
