56=(a+10)*8*1/2
112=8a+80
8a=32
a=4
P=56cm2
p=a+b*h/2
p=a+10*8/2
Sprawdzenie:
P=4+10*8/2=14*8/2==112/2=56
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56=(a+10)*8*1/2
112=8a+80
8a=32
a=4
P=56cm2
p=a+b*h/2
p=a+10*8/2
8a=32
a=4
Sprawdzenie:
P=4+10*8/2=14*8/2==112/2=56