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Area of an equilateral triangle

Area of a triangle given base and height

Area of a triangle given sides and angle

Area of a triangle (Heron's formula)

Area of a triangle given base and angles

Area of a square

Area of a rectangle

Area of a trapezoid

Area of a rhombus

Area of a parallelogram given base and height

Area of a parallelogram given sides and angle

Area of a cyclic quadrilateral

Area of a quadrilateral

Area of a regular polygon

Side of polygon given area

Area of a circle

Radius of circle given area

Area of a circular sector

Area of an arch given angle

Area of an arch given height

Area of an ellipse

Area of an elliptical sector

Area of an elliptical arch

Area of a parabolic arch