| A | B |
| crossproducts | when you multiply the denominator of one ratio by the numerator of another |
| equivalent ratios | they name the same number |
| proportion | an equation stating that two ratios are equal |
| rate | a comparison of two quantities by division that have different units |
| ratio | a comparison of two quantities by division that have the same units |
| scale | the ratio that compares a length in a drawing to the corresponding length in the actual object |
| unit cost | a unit rate that gives you the cost per unit |
| unit rate | the rate for one unit of a given quantity |
| polygons | a closed figure formed by three or more segment that do not cross |
| similar polygons | when corresponding angles are the same and corresponding sides are proportional in two polygons |
| commission | a percent of the amount of your sales |
| discount | the difference between the original selling price and the sale price |
| markup | the difference between the selling price and the store's cost to purchase the item |
| percent | a ratio that compares a number to 100 |
| sales tax | when you buy something it is the amount of money you pay to the government |