

$$V = \frac{4}{3} \pi {r}^{3}$$
Volume
$$r = \sqrt[3]{\frac{3 V}{4 \pi}}$$
Radius
$$S_{tot} = 4 \pi {r}^{2}$$
Total surface
$$r = \sqrt{\frac{S_{tot}}{4 \pi}}$$
Radius
$$A = \pi {r}^{2}$$
Area
$$r = \sqrt{\frac{A}{\pi}}$$
Radius
$$C = 2 \pi r$$
Circumference
$$r = \frac{C}{2\pi}$$
Radius
$$d = 2r$$
Diameter
$$r = \frac{d}{2}$$
Radius
Definition
A sphere is a solid made up from all points with a distance equal or less than a costant distance, called radius of the sphere, from a fixed point, called center of the sphere.
Properties
 The sphere is a solid generated from the rotation of a semicircle around its diameter
 Radius: any segment that extends from the center of the sphere to a any point of the spherical surface
 Pi (symbol $\pi$) constant value approximated as $$\pi \simeq 3.14$$
 All the Circle formulas are valid
Sphere Formulas
Data  Formula 

Volume  V = 4/3 × π × r^{3} 
Radius  V = ^{3}√[(3V) / (4π)] 
Total surface  S_{tot} = 4 × π × r^{2} 
Radius  r = √[S_{lat} / (4π)] 
Area  A = πr^{2} 
Radius  r = √(A / π) 
Circumference  C = 2πr 
Radius  r = C / (2π) 
Diameter  d = 2r 
Radius  r = d/2 