Question 1156909
<pre>
For any triangle,

{{{matrix(1,5,

(matrix(15,1,
the,
absolute,
value,
of,
the,
difference,
between,
the,
lengths,
of,
any,
given,
pair,
of,
sides)), 

""<"",

(matrix(6,1,
the,
length,
of,
the,
third,
side)),

""<"",

(matrix(11,1,
the,
sum,
of,
the,
lengths,
of,
that,
given,
pair,
of,
sides)) )}}}

So, if the third side is x, then 

|6-3| < x < 6+3
  |3| < x < 9
    3 < x < 9

The smallest possible whole number that fits that inequality is 4.

[You weren't asked, but the greatest possible whole number that fits that inequality is 8.]

Edwin</pre>