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a√2 - przekątna kwadratu
a√2 = 8√2
a = 8 cm
P - pole = a² = 8² = 64 cm²
d=8√2 cm.
d=a√2
a√2=8√2 /:√2
a=8
p=a*a
p=8*8=64cm
d=8√2 cm.
d=a√2
8√2 =a√2
a=8
p=a2
p=82(do kwadratu)
p=64 cm2