| A | B |
|---|
| planes | 2 dimensional figures |
| congruent | having the same size and shape |
| similar | having the same shape but different size |
| line symmetry | you can fold it to make two parts that are mirror images |
| reflection | mirror image |
| line | is straight and continues forever in both directions |
| line segment | is straight and has two end points |
| ray | begins at one point and goes on forever in one direction |
| angles | where lines, line segments, or rays meet |
| perpendicular | meeting at right angles |
| parallel lines | lines that are always the same distance apart |
| vertex | the 'corner' of the angle |
| quadrilateral | a figure with four sides |
| trapezoids | have one set of parallel sides |
| parallelograms | have two sets of parallel sides |
| rhombus | a parallelogram with 4 equal sides |
| rectangle | a quadrilateral with 4 right angles |
| perimeter | the distance around a figure |
| square | a rectangle with sides of equal length |
| isosceles trapezoid | a trapezoid with two sides of equal length |
