# High School Math : How to find the radius of a sphere

## Example Questions

### Example Question #691 : Geometry

Find the radius of a sphere whose surface area is .   Not enough information to solve  Explanation:

We know that the surface area of the spere is .  Rearrange and solve for .   ### Example Question #692 : Geometry

What is the radius of a sphere that has a surface area of ?      Explanation:

The standard equation to find the area of a sphere is where denotes the radius. Rearrange this equation in terms of : To find the answer, substitute the given surface area into this equation and solve for the radius: ### Example Question #151 : Solid Geometry

Given that the volume of a sphere is , what is the radius?      Explanation:

The standard equation to find the volume of a sphere is where denotes the radius. Rearrange this equation in terms of : Substitute the given volume into this equation and solve for the radius: ### Example Question #691 : Geometry

What is the radius of a sphere with a volume of ?     Explanation:        ### All High School Math Resources 