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a=9cm
b=9cm-2cm=7cm
P=(a+b)*h/2
P=((7+9)*6/2=16*3=48 cm²
Pole trapezu= (9cm + 7cm) x 6 16 cm x 6
(podzielone przez 2) = (podz.prz.2) = 96 cm : 2 = 48cm(kwadratowych)