| Term | Definition |
| approximate | more or less correct or exact |
| estimate | an answer that is more or less correct |
| arithmetic | the branch of mathematics that deals with adding, subrtacting, multiplying and dividing |
| multiple | the product of the number multiplied by a whole number |
| geometry | the branch of mathematics that deals with the measuring of lines, angles, surfaces and solids |
| octagon | a figure with eight sides |
| circumference | the distance around a circle |
| parallel | referring to lines that never intersect |
| perpendicular | coming together to form a right angle |
| perimeter | the distance around a polygon |