Without an angle, we cannot solve for the third side, unless this is a right triangle
This is the formula for a right triangle
c=hypotenuse
a and b are the other two sides
[tex]{a}^{2} + {b}^{2} = {c}^{2} [/tex]
If 7 and 3 are the length in inches of the angles beside the 90° angle, then
[tex]{3}^{2} + {7}^{2} = {c}^{2} \\ 9 + 49 = {c}^{2} \\ c = \sqrt{58} [/tex]
