This week I learned how to do the surface area and volume of spheres/hemispheres.

  • The diameter of a sphere = the height of the sphere
  • Volume of a sphere= volume of 2 cones = 4/3 \pi r ^3
  • Surface area of a sphere = 4 \pi r ^ 2
  • Volume of a hemisphere = 1/2 the volume of a sphere = 2/3 \pi r ^3
  • Surface area of a hemisphere = 1/2 the surface area of a sphere + a circle = 3 \pi r ^ 2

Example- surface area and volume of a sphere:

Example- surface area and volume of a hemisphere: