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a=8m
b=5m
h=4,2m
P=13m*4,2m/2=54,6/2=27,3m²
P=1/2×(8+5)×4,2
P=1/2×13×4,2
P=27,3m
Odp.Pole trapezu wynosi 27,3 m.
b = 5 m
h = 4,2 m
P = (a+b)*h/2
P = (8+5)*4,2 /2
P = 13*4,2 /2
P = 54,6/2
P = 27,3 m² << pole trapezu