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a= 26cm
b= 13cm (26÷2=13)
h= 12cm
P= ½ (26+13) × 12
P= ½×39×12
P=234 cm²
P=(26+13):2*12
P=39:2*12
P=19,5*12
P=234cm²
odp.pole trapezu wynosi 234cm²
b=1/2*26cm=13cm
h=12cm
P=1/2(a+b)*h
P=234cm^2