SOLUTION: How do I find the surface area of square pyramids, regular tetrahedrons, cones, spheres, an hemispheres?

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Question 534482: How do I find the surface area of square pyramids, regular tetrahedrons, cones, spheres, an hemispheres?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
http://en.wikipedia.org/wiki/Surface_area