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PROSZĘ! ^
a - bok kwadratu
wzór na przekątną to:
d = a*√2
więc:
24 = a*√2
a = 24 / √2 - usuwamy nie wymierność z mianownika
a = 12*√2
P = a²
P = 288 [cm²]
P= 1/2 * (24)2 = 1/2 * 576=188 [cm2]