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h= a√3 / 2
h= 6√3 / 2
h= 3√3
r= 6/ 2= 3
r=3
V= 1/3* π* 9* 3√3
V= 9√3π cm³
6²-3²=x²
x=√27
P=(π*9*√27)/3
P=3√27π