| A | B |
|---|
| perimeter | the distance around the outside of a figure |
| parallel | two lines that are in the same plane but do not intersect |
| polygon | a closed figure in a plane, made of line segments that intersect only at their endpoints |
| trapezoid | a quadrilateral with exactly two sides parallel |
| parallelogram | a four-sided figure whose opposite sides are parallel and of the same length |
| isosceles triangle | a triangle with at least two sides of the same length |
| quadrilateral | a polygon with 4 sides |
| vertex | the common endpoint of two rays forming an angle |
| complementary | two angles whose measures add up to 90 degrees |
| unit rate | a rate in which the second number in the comparison is one unit |
| supplementary | two angles whose measures add up to 180 degrees |
| circumference | the perimeter of a circle |
| pi | for any circle, the ratio of the circumference to the diameter |
| volume | the number of cubic units an object contains |
| area | the amount of surface a figure covers |
| surface area | the sum of the areas of each face of a polyhedron |
| proportion | a pair of equal ratios |
| percent | a ratio comparing a number to 100 |
| ratio | a comparison of two quantities, often written as a fraction |
