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Formula for Geometrical Figures

pi (π)=3.1415926535 … Perimeter formula Square 4 × side Rectangle 2 × (length + width) Parallelogram 2 × (side1 + side2) Triangle side1 + side2 + side3 Regular n-polygon n × side Trapezoid height × (base1 + base2) / 2 Trapezoid base1 + base2 + height × [csc(theta1) + csc(theta2)] …

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