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P=a²√3÷4
9√3=a²√3÷4 / ×4
18√3=a²√3
a=√18
a=3√2
9 pierw z 3 = (a kwadrat * pierwiatek z 3)/4
9 pierw z 3 * 4/pierw z 3 = a kw
36 = a kw
a=6
P=(a²√3)/4
a- bok trójkąta równobocznego
Dane:
P=9√3 [jednostek²] <<<<podstawiam do wzoru
9√3 =(a²√3)/4 |*4
36√3=a²√3 |:√3
a²=36
a=6 [jednostek]