Answer:
H=5
Explanation:
Since it's a right triangle, you can use the Pythagorean Theorem which is
or in this case:
Substitute 3 in for f and 4 in for g:

Add 9 and 16 together, it's 25 and then find the square root of 25 and the square root of h and the answer is 5

GOOD LUCK! :)