| A | B |
|---|
| congruent | having the same size and shape |
| equlateral triangle | a triange with 3 congruent sides |
| exterior | the outside (for example, an outside angle) |
| interior | the inside (for example, the inside angle) |
| isosceles triangle | a triangle with two congruent sides |
| parallel | lines that never meet are called parallel lines |
| parallelogram | a quadrilateral with two pairs of parallel sides |
| perpendicular | two lines that intersect and form a right angle are called perpendicular lines |
| rectangle | a quadrilateral with 4 right angles |
| rhombus | a quadrilateral with 4 congruent sides |
| right triangle | a triange with 1 right angle |
| square | a quadrilateral with 4 right angles and 4 congruent sides |
| trapezoid | a quadrilateral with exactly one pair of parallel sides |
