To solve this, we need to use Pythagorean Theorem. This is a formula that says a²+b²=c². A and B represent the legs of the triangle while c is the hypotenuse. We can simply substitute in our values for a and b and solve.
a²+b²=c²
8²+6²=c²
64+36=c²
100=c²
√100=√c²
10=c
Using the math above, we can see that c (x) equals 10.