| A | B |
|---|
| right triangle | triangle with a 90 degree angle |
| isosceles triangle | triangle with 2 congruent sides |
| equilateral triangle | triangle with 3 congruent sides |
| quadrilateral | any 4 sided figure |
| rhombus | parallelogram with 4 congruent sides |
| square | a rectangle with 4 congruent sides |
| pentagon | a 5-sided figure |
| octagon | an 8-sided figure |
| trapezoid | quadrilateral with 1 pair parallel sides |
| parallologram | quadrilateral with 2 pairs parallel sides |
| acute angle | an angle less than 90 degrees |
| obtuse angle | an angle greater than 90 degrees |
| right angle | an angle equal to 90 degrees |
| ray | endless path with a starting point |
| line | an endless straight path |
| line segment | a straight path from 1 point to another |
