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Chapter 6 - Geo.

Chapter 6 Vocabulary - Similarity

WordDefinition
center of dilation in dilation, the fixed point about which the figure is enlarged or reduced
dilation a transformation that stretches or shrinks a figure to create a similar figure
enlargement a dilation with a scale factor larger than one
extremes of a proportion the first and last terms of a proportion
geometric mean for two positive numbers a and b, the positive number x that satisfies a/x = x/b; so x squared = ab and x = the square foot of ab
means of a proportion the middle terms of a proportion
proportion an equation that states that two ratios are equal
ratio of a to b a comparison of two numbers using division; the ratio of a to b, where be does not equal 0, can be written as a to b, as a:b, or as a/b
reduction a dilation with a scale factor between 0 and 1
scale a ratio that describes how the dimensions in a scale drawing are related to the actual dimensions of the object
scale drawing a drawing that is the same shape as the object it represents
scale factor of a dilation in a dilation, the ratio of a side length of the image to the corresponding side length of the original figure
scale factor of two similar polygons the ratio of the lengths of two corresponding sides of two polygons
similar polygons two polygons such that their corresponding angles are congruent and the lengths of corresponding sides are proportional
Created by: kgatling