Chat with our AI personalities
measure the radius of the sphere and apply the appropriate volume equation: V= (4/3) x (pi) x r3
NONE!!! However, there are two sides to a sphere ; viz. INside and OUTside. Ha!!!Ha!!! Ha!!! My silly joke!!!!!
Find the surface area of the full sphere [ A = 4 pi R2 ] and then take half of it. You wind up with [ 2 pi R2 ] for the outside surface area of a half sphere, or [ 4 pi R2 ] for the (inside + outside) surface area of the half sphere. (Since the inside and outside are now both exposed to the weather, you probably want to paint both surfaces.)
the radius would have to be around 2.45cm.
A triangle (or other polygon) on a concave surface (such as the inside of a sphere), possibly.