| A | B |
|---|
| rhombus | quadrilateral with congruent sides |
| triangle | polygon with three sides |
| pentagon | polygon with five sides |
| obtuse angles | angle greater than 90 degrees |
| right angle | angle of 90 degrees |
| acute angle | angle of less than 90 degrees |
| rectangle | quadrilateral with right angles |
| isosceles | triangle with two congruent sides |
| scalene | triangle with no congruent sides |
| octagon | polygon with eight sides |
| square | rectangle with congruent sides |
| decagon | polygon with ten sides |
