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a=√2cm
Pole =a² = 2cm²
obw kwadraty= 4*a
a krawedz kwadzrtu
4√2cm=4a /:4
a=√2cm
p=a²(=√2cm)²=2cm2
P=a²
Ob=4a
4√2/4=√2
a- bok ma √2cm
P=(√2)²=2cm²