Answer
The answer is 10.
Explanation
Using the formula a^2+b^2=c^2 you first plug in the variables given in this problem which is f^2+g^2=h^2. Since f and g are leg lengths of the triangle they are plugged in before the equal sign. The hypotenuse is after the equal sign, it this scenario it is the variable h. Next, replace the variables with their values. The equation f^2+g^2=h^2 becomes 6^2+8^2=h^2. Then, you solve all the squared numbers 6^2 becomes 36 and 8^2 becomes 64. Once you solve them, add them together which gets you 100. Lastly, get the square root of 100 and you get the answer 10.