<PRE><B>Question 541701</B>
&lt;br&gt;&lt;font face=&quot;Tahoma&quot;&gt;This kind of triangle problem is fairly simple.&lt;br&gt;
There is a rule for triangle side lengths.&lt;br&gt;
Each leg must be between the difference and sum of the other two legs (non-inclusively).&lt;br&gt;
So, since your two legs are 4 and 9, we have: &lt;br&gt;
{{{9-4&lt;s&lt;9+4}}}&lt;br&gt;
{{{5&lt;s&lt;13}}}&lt;br&gt;
Therefore the possible length of the third side of your triangle would be:&lt;br&gt;
any real number between 5 and 13 (not including 5 and 13 of course).  Or&lt;br&gt;
{{{5&lt;s&lt;13}}}&lt;br&gt;
If the 3rd side of your triangle was 5 or 13, it would be a degenerate triangle which appeared to be a straight line.&lt;br&gt;
I hope this helps!&lt;br&gt;&lt;br&gt;</PRE>