Answer:
17.3 ft
Step-by-step explanation:
We can use the Pythagorean theorem to solve
a^2 + b^2 = c^2 where a and b are the legs and c is the hypotenuse
10^2 + h^2 = 20^2
100 + h^2 =400
Subtract 100 from each side
h^2 = 400-100
h^2 = 300
Taking the square root of each side
sqrt(h^2) = sqrt(300)
h = 17.32050808
Rounding to the nearest tenth
h = 17.3 ft
