Question 934039
Assuming that's she's trying to make a right triangle, we can use the Pythagorean Theorem to find the possible length.
{{{ a^2 + b^2 = c^2 }}}
{{{ 5^2 + 9^2 = c^2 }}}
{{{ 25 + 81 = c^2 }}}
{{{ 106 = c^2 }}}
{{{ sqrt(109) = c }}}
The possible length can only be the square root of 109.