The tangent of an angle is a ratio so, if you mean pi, and not pie, then it is simply a product of two ratios.
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for the surface area:4 times pie times radius squared for volume:4/3 times pie times radius cubed
You times it by 2....UR WELCOME
A common tangent is a line which is tangent to two (or more) curves.
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i cant get the pie sign so whenver theres a ^ it means pie (3.14....)JUST REMEMBER.....Cherry pies are delicousC=^dcircumferance= pie times diameterapple pies are too!A=^r2area= pie times radius 2