Mr. Haley is leaning a ladder against the side of his house to repair the roof. The top of the ladder reaches the roof, which is 16 feet high.
The base of the ladder is 12 feet away from the house, where Mr. Haley's son is holding it steady.
How long is the ladder?

20 feet

Step-by-step explanation:

Remember the Pythagorean theorem,

x^2 + y^2 = n^2

in this case

x= 16

y = 12

so substitute back into the equation

16^2 + 12^2 = n^2

256 + 144 = n^2

400 = n^2

sqrt ( 400) = n

20 = n

you divide them and then you get the answer i took this class this year

step-by-step explanation: