Dale Copy of G.GGMD.3 Volume of Spheres
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 = r2h - r2 h. Therefore, half a sphere = r2h. If half a sphere = r2h, then an entire sphere equals r2 h. And, a sphere's radius and height are equal, so the formula can be cleaned up to r3
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.](https://www.geogebra.org/resource/pvxyx5uv/EeRMCuPGX22Q7wCG/material-pvxyx5uv.png)
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.](https://www.geogebra.org/resource/tvh4ygav/CJbp3Ca5rmevNNnO/material-tvh4ygav.png)
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.](https://www.geogebra.org/resource/perybg5c/0WD0NgVcZ14ssZTo/material-perybg5c.png)
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.](https://www.geogebra.org/resource/mvxk3tr9/rYxyP7FCChYOAeCG/material-mvxk3tr9.png)
You try #1. Find the volume of the sphere using either 3.14 or 22/7 for pi.
![You try #1. Find the volume of the sphere using either 3.14 or 22/7 for pi.](https://www.geogebra.org/resource/pnenhafn/7xcLtAvvrmO08RcE/material-pnenhafn.png)
You try #2. Find the volume of this 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.](https://www.geogebra.org/resource/nesexn7x/8KiLkuA25IzGV4IH/material-nesexn7x.png)
You try #3. 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.](https://www.geogebra.org/resource/tpnmbta8/45cdXWwDILaPuWpq/material-tpnmbta8.png)
Answers to the you try problems.
Place your 3 answers below. All answers should be in cubic units! 1. 2. 3.