| A | B |
|---|
| Square | a rectangle w/ 4 right angles |
| Line Segment | a line with 2 endpoints |
| Acute angle | angle that measures between 0 and 90 degrees |
| triangle | polygon w/ 3 sides and 3 vertexes |
| quadrilateral | polygon w/ 4 sides and 4 vertexes |
| obtuse angle | angle that measures between 90 -180 degrees |
| parallel lines | lines that will never touch or meet |
| perpendicular lines | lines that meet to form right angles |
| right angle | angle that measures 90 degrees |
| trapezoid | quad. with 1 set of parallel lines |
| formula for circumference | c = d x pi ( pi=3.14 ) |
| area of a circle | r x r x pi (pi=3.14) |
| area of a right triangle | b x h divided by 2 |
| area of a rectangle | b x h |
| diameter | r x 2 (r = radius) |
| radius | d divided by 2 (d= diameter) |
| parallelogram | quad. w/ 2 sets of parallel lines |
| straight line measures | 180 degrees |
| rhombus | parallelogram w/ 4 equal sides |
| vertex | point where 2 or more lines meet |
