This online calculator calculates the area of a polygon given lengths of polygon sides and diagonals, which split the polygon into non-overlapping triangles. As shown in the picture, you can sum areas of triangles ABD, BCD, and ADE to

To use our area of polygon calculator, follow the below steps: Select the property of polygon from the given list that you want to calculate. Select the given value form the list. Enter the number of sides of the polygon in the given input box.

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