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Czyli:
P = 6cm * 6cm = 36cm²
Ob = 4 * 6cm = 24cm
6=a√2
a=6/√2
a=6√2/√2*√2
a=6√2/2
a=3√2
P=a²
P=(3√2)²
P=18 cm²
O=4a
O=4*3√2
O=12√2 cm