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P=1/2x(a+b)x h =1\2x(5+3)x2,5=1\2x8x2,5=1/2x200=100cm2
2.
P=1/2x(a+b)x h =1/2x(3,5+1,5)x2=1/2x5x2=1/2x10=5cm2
Liczę na naj
Sorry nie umiałam zrobić kwadratowych ale proszę.