-> 45.36/ height2 = 5 -> height2 = 5 * 45.36 = 226.8  You made a slight mistake there. It should be: height2 = 45,36 / 5 = 9.072 -> height = sqrt(9.072) ~ 3.01 That's significantly less. 3.01 meters is 9'10.5", which is still more than the tallest human to have existed.