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P'/P=k² =(5/2)² =25/4 stosunek pól to kwadrat skali podobieństwa
P'=50 cm²
P=P' :k²
P=50 :25/4
P=50*4/25
P=8 cm² pole ABC
50/x=(5/2)²
50/x=25/4
25x=200/25
x=8
Odp Pole wynosi 8cm²