5
X
40
9
Find the exact value of x.
x =

Since that is a right triangle, we can use pythagorean theorem.
[tex]c^2=a^2+b^2[/tex]
solve.
[tex]c^2=40^2+9^2\\\\c^2=1681\\\\\sqrt{c^2}=\sqrt{1681} \\\\c=41[/tex]
the value of x is 41