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  1. Geometry Formula Sheet - Math Salamanders

    A general formula for this rule for an n-sided regular polygon is: Interior angles add up to\[ (n - 2) \times 180^{\circ} \] Each angle must be\[ {180 (n-2)^{\circ} \over n} \]

    Math Salamanders

    A general formula for the area of a regular polygon with n-side of length s is: \[ A = {ns^2 \over 4 \tan ({180^{\circ} \over n})} \] This can also be written:\[ A = {n \over 4 } s^2 \cot ({180 \over n})^{\circ} \] For more support finding the area of regaular polygons, try our calculator: 1. Area of a Regular Polygon Calculator

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    A general formula for the perimeter of a regular polygon with n-side of length s is: \[ P = n \times s \]

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