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Scaling figures and the scale ratio

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Published on May 2, 2012

When a figure is enlarged or shrank proportionally, or when two figures are similar, the scale ratio is the ratio of one side of the figure to the corresponding side in the other. When the scale ratio is given, we can solve an unknown side. Or, if a set of corresponding sides is given, we can write a proportion to solve for the unknown side.

This lesson is meant for prealgebra or grade 7 math.

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