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b=krótsza=22,5m
h=krótsze ramię= wysokosc
c=dłuzsze ramię=15m
a=b+x
31,5=22,5+x
x=31,5-22,5=9m
x²+h²=c²
9²+h²=15²
h=√[225-81]=√144=12m
a]
P=1/2(a+b)h=1/2(31,5+22,5)*12=324m²=3,24 ara
b]
obwód=31,5+22,5+12+15=81m potrzeba siatki