Răspuns :
Răspuns:
AB+AC=290 =>AB=290-AC
AC+BC=420 =>BC=420-AC
AB+BC=410
290-AC+420-AC=410
710-2AC=410
-2AC= -300
AC=150
AB=290-AC=290-150 => AB=140
AB+BC=410 => 140+BC=410 => BC=270
Răspuns:
AB+AC=290 =>AB=290-AC
AC+BC=420 =>BC=420-AC
AB+BC=410
290-AC+420-AC=410
710-2AC=410
-2AC= -300
AC=150
AB=290-AC=290-150 => AB=140
AB+BC=410 => 140+BC=410 => BC=270