# math chap 5 gr 7

## 15 terms

### ratio

Comparing two quantities by division

### rate

A ratio that compares two quantities measured in different units

### unit rate

a rate in which the second quantity in the comparison is one unit

### equivalent ratios

two ratios that have the same value.

### proportion

an equation that states that two ratios are equal

### cross product

the product of numbers on the diagonal when comparing two ratios

### unit conversion

process of changing 1 unit of measure to another

### similar

figures with the same shape..not size..

### corresponding sides

matching sides on two or more polygons

### corresponding angles

angles form by tranversal & 2 line in diagram

### indirect measurement

the technique of using similar figures and proportions to find a missing measurement

### scale model

a proportional model of a three dimensional object

### scale factor

the ratio used to enlarge or reduce similar figures

### scale

ratio between two sets of measurement

### scale drawing

drawing that uses a scale to make an object smaller or larger than the real object