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b=16cm
h=10cm
P=(a+b)*h:2
P=(12cm+16cm)*10cm:2
P=960cm²
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2
p=(12+16)x10
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2
p=28x10
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2
p=28x5=140 cm2
b-16
h- 10
P=(a+b)*h/2
P=(12+16)*10/2=28*10/2=280/2=140
Pole wynosi 140 cm