| A | B |
|---|
| acute triangle | triangle with all acute angles |
| right triangle | triangle with one right angle |
| obtuse triangle | triangle with one obtuse angle |
| scalene triangle | triangle with no congruent sides |
| isosceles triangle | triangle with at least two congruent sides |
| equilateral triangle | triangle with three congruent sides |
| congruent | equal |
| quadrilateral | closed shape with four angles and four sides |
| parallelogram | quadrilateral with opposite side parallel and opposite side congruent |
| trapezoid | quadrilateral with one pair of parallel sides |
| rectangle | parallelogram with 4 right angles |
| square | parallelogram with 4 right angles and 4 congruent sides |
| rhombus | parallelogram with 4 congruent sides |
