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2.P= 8x8 :2 = 64:2 = 32cm kwadratowe.
2.
d=a√2
8=a√2 /: √2
8√2 ÷ 2 = a
4√2 cm = a
P= a × a
P= (4√2)²= 16 × 2 = 32 cm²