| A | B |
| acute angle | any angle that measures less then 90 degress |
| area | the amount of space enclosed in a figure |
| circle | closed curve |
| circumference | the distance around a circle |
| congruent angles | angles that have the same measurement |
| equilateral triangle | triangle with 3 congruent sides |
| formula | a statement of a mathematical relationship |
| hexagon | 6-sided polygon |
| isosceles triangle | is a triangle with at least 2 congruent sides |
| parellel lines | lines that do not intersect |
| parellelogram | quadrilateral with 2 pairs of opposite sides parellel |
| pentagon | 5 sided polygon |
| perpendicular lines | lines that intersect to form right angles |
| polygon | closed plane figure with at least 3 sides |
| quadrilateral | polygon with 4 sides |
| rectangle | a parellelogram with 4 right angles |
| rhombus | a parellelogram with 4 congruent sides |
| right angle | angle with a measure of 90 degrees |