# Area Of Regular Polygon Proof

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An illustration showing that the area of a regular polygon is equal to the area of a triangle whose base is equal to the sum of all the sides, and the height a equal to the appotem of the polygon. “The reason of this is that the area of two or more triangles ABC and ADC having a common or equal base b and equal height h are alike.”

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Geometric Theorems and Proofs### Source

Albert A. Hopkins *Scientific America: Handy Book Of Facts And Formulas* (New York: Munn & Co., Inc., 1918) 37

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