Area of a circle = r² x 3.1416

Area of a square = S²

Area of a triangle = ½b x a

Area of a triangle = b x a

Surface of a cube = S² x 6

Surface of a cylinder =
(2 x r² x 3.1416) ÷ (d x L x 3.1416)

Volume of a cube = S³

Volume of a cylinder = r² x 3.1416 x L