formula for finding longest side, given 2 shorter sides

[simonc]

what is the formula for finding the longest side of a triangle when you know the shorter sides

 

[Loren]

Re: formula

There is none. You need to have more information, such as the measure of an angle or the location of the end points of the sides on a Cartesian coordinate graph.

 

[Denis]

Re: formula

You need at least the size of one angle.
Else longer side can be more than 1 value; simple example:
3-8-9
3-8-10

 

[stapel]

what is the formula for finding the longest side of a triangle when you know the shorter sides

Are you maybe referring to the special case wherein the triangle is a right triangle...?