Question 1020856
{{{a^2+b^2 = c^2}}}, where c is the length of the diagonal (or hypotenuse), and a, and b are the lengths of the sides.  Here, c = 97 and say, a, is 72.

==> {{{72^2+b^2 = 97^2}}} ==> {{{b = sqrt(97^2 - 72^2) = 65}}}.