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d=24
24=a√2 /÷√2
a=12√2
P=a²
P=(12√2)²
P=288
d = a pierwiatek z 2
a pierwiastek z 2 = 24 cm
a= 12 pierwiastków z 2
P = a2
P = (12 pier. z 2) 2
P = 288 cm 2
P = 24*24/2
p = 576/2
p = 288cm2