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Ch.4 App.Proportions

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congruent angles angles that have the same measure
conversion factor rates equal to 1
cross products two ratios are found by multiplying the denominator of one ratio by the numerator of the other ratio
dilation is a transformation where the original figure and its image are similar
enlargement a dilation with a scale factor greater than 1
indirect measurement uses proportions and similar triangles to measure distances that would be difficult to measure directly
proportion is an equation stating that two ratios are equal
rate is a ratio that compares two quantities measured in different units
reduction a dilation with a scale factor less than 1
scale is the ratio that compares a length in a drawing to the corresponding length in the actual object
scale factor the ratio of the dimensions of the image to the dimensions of the original figure
scale model is an enlarged or reduced model of an object that is similar to the actual object
similar figures have the same shape but not necessarily the same size
similar polygons if the corresponding angles of two polygons have the same measure and the lengths of their corresponding sides are proportional
unit rate the rate for one unit of a given quantity
Created by: cpasteris