Question 307922
There is either a typo here or the question is just not clear.

A right triangle has the following equation:

(side)^2 + (side)^2 = (hypotenuse)^2

I believe you are searching for the hypotenuse.

In that case, 8^2 + 11^2 = x^2.

However, based on your wording, the equation could also be one of the following:

x^2 + 8^ = 11^2

OR

x^2 + 11^2 = 8^2

If you are searching for the hypotenuse, then use 8^2 + 11^2 = x^2.

If you are seaching for one of the missing sides when the hypotenuse is 11 and the given side is 8, then use x^2 + 8^ = 11^2.

If neither, then use x^2 + 11^2 = 8^2.

Understand?