Metal, metal, nonmetal, metal, nonmetal, nonmetal. For the covalent bonds, it's always between nonmetals. For the ionic, it's a metal and a nonmetal. Hope this helps!
By using pythogorus theorum
(ab)2=(bc)2 +(ac)2
(14)2=(6)2+(ac)2
196=36+(ac)2
196-36=(ac)2
160=(ac)2
under root of 160=ac
12.6 Approx.
[2=square]
