Definitions
a = area, b = base, c = circumference
d = diameter, h = height, l = length
r = radius, w = width,
pi = 3.1416
Circle
Area = pi x r sq.
Circumference =pi x d OR 2 pi x r
Diameter = c / pi
Radius = c / 2 pi
Sphere
Circumference = 3.8978 x (cube root of volume)
Diameter = 1.2407 x (cube root of volume)
Diameter = 0.56419 x (square root of surface)
Surface area = c x d
Volume = 0.1667(surface area) x d
Rectangle or Square
Area = l x w
Cube or Rectangular Box
Volume = l x w x h
Triangle
Area = 0.5b x h
Cone
Volume = 0.333h x (area of base)
Cylinder or Prism
Volume = h x (area of base)