Hemisphere Volume and Surface Area

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Around 225 BC, Archimedes found formulas for the volume and surface area of a hemisphere, where is the radius.


For a human on Earth, the sky looks like a hemisphere. The equator splits the Earth into the Northern and Southern Hemispheres. The Earth rotates, so you can see many stars in the sky, but you can only see Polaris from the Northern Hemisphere and Sigma Octantis from the Southern Hemisphere.


Contributed by:Ed Pegg Jr (May 2018)
Open content licensed under CC BY-NC-SA




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