Do you mean volume or surface area?
volume = 4/3 x pi x r^3 (four divided by three, multiplied by pi, multiplied by radius cubed).
surface area = 4 x pi x r^2 (four multiplied by pi, multiplied by radius squared).
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The radius of a sphere is 1/2 of its height.
Because when working out volumes the answer is given in cubic units and the radius in the formula for finding the volume of a sphere is cubed: Volume of a sphere in cubic units = 4/3*pi*radius3
Circumference of a circle given radius Area of a circle given radius Volume of a sphere given radius Surface area of a sphere given radius Converting degrees to radians or vice versa
Given a sphere of radius r, Surface area = 4{pi}r2 Volume = (4/3){pi}r3
Make the radius the subject of the formula 4/3*pi* radius3 = volume and then double it to give the diameter.