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x-35%x = 65%x = 0,65x - długość krótszego boku
2x + 2 (0,65 x) = 1,32
2x + 1,3 x = 1,32
3,3 x = 1,32 /:3,3
x = 0,4 m
0,65 × 0,4 m = 0,26 m
Pole = 0,26 m × 0,4 m = 0,104 m²