Topic 7 Vocabulary

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Vocab for geometry Topic 7

Geometry & Trigonometry

Similarity

center of dilation

in a dilation, the fixed point about which the figure is enlarged or reduced

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similarity transformation

a composition of a rigid motion and a dilation

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geometric mean

the number (x) such that a/x = x/b, where a,b, and x are positive numbers

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dilation

a transformation that changes the size of an object, but not the shape

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scale factor

the ratio of the lengths of two corresponding sides of two similar polygons

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similar

figures that have the same shape but not necessarily the same size

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