# Dale Copy of G.GGMD.3 Volume of Spheres

- Author:
- Dan Dale, Anthony OR 柯志明

## Volume of a Sphere

Notice that if you drag the slider, the volume of half a sphere (hemisphere) is equal to the volume of the cylinder minus the volume of the cone. So, half a sphere = r

^{2}h - r^{2 }h. Therefore, half a sphere = r^{2}h. If half a sphere = r^{2}h, then an entire sphere equals r^{2 }h. And, a sphere's radius and height are equal, so the formula can be cleaned up to r^{3}## Example #1. The radius is 9 and they used 3.14 for pi.

## Example #1. The radius is 9 and they used 3.14 for pi.

## Example #2. The radius is 8 and they used 3.14 for pi.

## Example #2. The radius is 8 and they used 3.14 for pi.

## You try #1. Find the volume of the sphere using either 3.14 or 22/7 for pi.

## You try #2. Find the volume of this sphere using either 3.14 or 22/7 for pi.

## You try #3. Find the volume of this sphere using either 3.14 or 22/7 for pi.

## Answers to the you try problems.

Place your 3 answers below. All answers should be in cubic units! 1. 2. 3.