# Geometry formulas and equations

The formulas listed below are commonly required in geometry to calculate lengths, areas and volumes. You can use these to help with your children's math homework.

## List of formulas

 Area of Square = length2 (l x l) Area of Rectangle = length x height Area of Triangle = 1/2 x length x height
 Area of circle = 𝛑r2 (𝛑 = 3.14 approximately) Circumference of a circle circumference = 2 r (𝛑 x diameter) Volume of rectangular prism = length x height x depth Volume of cylinder = area of base x height = 𝛑 (d/2)2 x h Volume of cone = 1/3 x area of base x height = 1/3 x 𝛑(d/2)2 x h
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