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Cube = 6 x e x e

Rectangular Prism or Rectangular Solid 
     = 2 x l x w x l x h x w h

Cylinder = 2 x pi x r x h + 2 x pi x r x r

Sphere or circle = r x r x pi x 4 divided by 3

Cone = pi x r x h + pi x r x r
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