| A | B |
|---|
| isosceles triangle | 3 sides,2 the same length |
| equilateral triangle | 3 sides, all the same length |
| scalene triangle | 3 sides, all different lengths |
| quadrilateral | 4 sides all different lengths |
| square | 4 sides, all the same length,right angles |
| rectangle | 4 sides, 2 pair of =length, right angles |
| rhombus | 4 sides, all same length, opposite sides parallel |
| parallelogram | 4 sides,2 pair of equal lengths, 2 pair of parallel sides |
| trapezoid | 4 sides, different lengths, 2 parallel sides, 2 nonparallel sides |
| ray | has an endpoint and goes on in one direction forever |
| protractor | a ruler for measuring angles |
| perpendicular | 2 intersecting lines that form right angles |
