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k=1/3
P'/P=k² =(1/3)² stosunek pol to kwadrat skali podobieństwa
P'/P=1/9
P/P'=9/1
2.
e=12
f=16
P=ef/2
P=12*16/2
P=96 [j²] pole
a²=(1/2 e)²+(1/2 f)²
a²=6²+8² =36+64 =100
a=√100
a=10 [j] bok
O=4a
O=4*10
O=40 [j] obwód