sou2al 4 hasbi fih m bel 9anoun ta3 mountasaf 9it3a mmbed hasbi ihdathiyat n CA=3CN =>(6;2)=3(x'-4;y'-0)=>6/3=x'-4 x'=6 wa 2/3=y'-0 y'=2/3 mmbed 3adna MN(11/2;-5/3) wa MD (-3/2;-13/2) dok ntab9ou 9anoun xy'-x'y=0