24We can see that it is a isosceles triangle, which means it has two sides of equal length.
Since left side measures 24, the right side must be 24 too.
Also in a isosceles triangle, the height of the triangle is the straight line that divide its base in two equal sides. That means that we have:
Lets apply the Pythagorean theorem on the right triangle. We get:
[tex]\begin{gathered} 24^2=11^2+x^2 \\ 576=121+x^2^{} \\ x^2=576-121 \\ x^2=455 \\ x=\sqrt[]{455} \\ x\approx21.3 \end{gathered}[/tex]
