Calculate volume, surface area, diameter and circumference of a sphere from its radius.
A sphere is perfectly round in 3D. Its volume is (4/3)πr³ and surface area is 4πr². These formulas were derived by Archimedes.
Volume
V = (4/3)πr³
Surface Area
SA = 4πr²
r = ∛(3V/(4π)). Take the cube root of 3V divided by 4π.
V/SA = r/3. As the sphere grows, volume increases faster than surface area.