3D Sphere, Hemisphere Volume and Total Surface Areas
Use this applet to view calculations of total surface areas of spheres and hemispheres.
Use this applet to view calculations of total surface areas of solid spheres and solid hemispheres.
Hemisphere is half the sphere.
1. What is the volume of the hemisphere compared to that of the sphere?
2. Why is the total surface area of a hemisphere 3/4 of the total surface area of the sphere and not 1/2 ?
3. What if the sphere is hollow? How is the hemisphere's total surface area different compared with the answer in 2?
(Ask your teacher or classmates for the answers to Q3)