cine ma poate ajuta?

Răspuns:
__A_____B___C_____D__
AB=3cm
AC=5cm
BD=6cm
BC,CD,AD=?
BC=AC-AB=>BC=5-3=>BC=2cm
CD=BD-BC=>CD=6-2=>CD=4cm
AD=AB+BC+CD=>AD=3+2+4=>AD=9cm