Similar Figures / Proportion Solver

Use a proportion between corresponding sides of similar figures to find a missing length, plus the scale factor.

Corresponding sides are proportional: a ∕ a' = b ∕ b'. Enter the three you know to find b'.

Missing side b'

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Scale factor

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Area ratio

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Step by step

  1. Enter the three known sides.

Free tool by Effortless Math — we help students learn to love mathematics.