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Bok=4,8*1,5=7,2cm
obwód=4,8+7,2*2=19,2cm
Odp.Obwód tego trójkąta wynosi 19,2cm
1,5=x
1x=4,8*1,5
x=7,2
Obw=2a+b
Obw= 2*7,2+4,8=19,2