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Ch 5 Ratios, Rates,
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| Question | Answer |
|---|---|
| cross products | are found by multiplying the denominator of one ratio by the numerator of the other ratio |
| equivalent ratios | two ratios that name the same number |
| indirect measurement | uses proportions and similar triangles to measure distances that would be difficult to measure directly |
| polygon | a closed plane figure formed by three or more line segments that do not cross |
| proportion | an equation stating that two ratios are equal |
| rate | a ratio that compares two quantities measured in different units |
| ratio | a comparison of two quantities by division |
| scale | is the ratio that compares a length in a drawing to the corresponding length in the actual object |
| scale drawing | is an enlarged or reduced drawing of an object that is similar to the actual object |
| similar polygons | two polygons if corresponding angles have the same measure and the lengths of their corresponding sides are proportional |
| unit cost | a unit rate that gives the cost per unit |
| unit rate | the rate for one unit of a given quantity |