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P=a2√3/4
9√3=a2√3/4 *4
36√3=a2√3/:√3
36=a2
a=√36
a=6
P=9√3
9√3=a²√3/4 /×4
36√3=a²√3 /×√3
36×3=a²×3 /÷3
36=a²
6=a
36√3=a do 2√3|\√3
36=a do 2
a=pierw z 36
a=6