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ZAD.1
P= a2√3/4
r=6cm
r=1/3h
r=a√3/6
6=1√3/6 /*6
36= a√3 / : √3
36/√3= a / * √3
36√3/3= a√3 / :√3
a= 12
P= 144√3/4
P= 36√3