What is the surface area of a sphere?

Surface area. The surface area of a sphere of radius r is: =. Archimedes first derived this formula from the fact that the projection to the lateral surface of a circumscribed cylinder is area-preserving. read more

Surface area of sphere.mhp' solves two kinds of problems: To solve a problem like example 1 above, where you calculate the surface area of a sphere given the radius: The value in the 'X' edit box must be a '1'. read more

The surface area of a sphere is given by the formula Where r is the radius of the sphere. In the figure above, drag the orange dot to change the radius of the sphere and note how the formula is used to calculate the surface area. read more