Posted by Lucy on Saturday, May 5, 2012 at 8:20am.
b=2, c+ sqrt of 13. Trying to find the length of the 3rd side.
It is a right triangle with A on top, 2 on the right side and the sqrt of 13 on the left.

Algebra  bobpursley, Saturday, May 5, 2012 at 8:56am
s^2= sum of two squares of sides=4+13=17
s=sqrt 17