| A | B |
|---|
| plane shapes | flat shapes |
| circle | 0 sides, 0 vertices |
| square | 4 equal sides |
| triangle | 3 sides |
| rectangle | 2 long sides, 2 shorter sides |
| pentagon | 5 sides |
| hexagon | 6 sides |
| right angle | looks like an "L" 90 degrees |
| acute angle | less than a right angle |
| obtuse angle | greater than a right angle |
| quadrilateral | any 4 sided shape |
| parallelogram | opposite sides same distance apart |
| rhombus | special type of parallelogram; all 4 sides are same length |
| trapezoid | a quadrilateral; only 1 pair of opposite sides are same distance apart |
| congruent | same size, same shape |
| symmetry | a shape with 2 matching parts |
| line of symmetry | the line on which a figure can be folded so that the 2 halves match exactly |
| slide | move a figure on a line |
| flip | turn something over, front to back |
| turn | to rotate a figure around a point |
