What we have here is a classic case of pythagorean theorem. 5 is the hypotenuse and 8 is divided directly in half to make one of the legs equal to 4. inputting this into the pythagorean equation we get 4^2 + h^2 = 5^2 or 16 + h^2 = 25. 25 - 16 = 9 and the square root of 9 is 3. therefor <em>h = 3</em>
