Question

A ladder reaches a window 20 feet above the ground. The foot of the ladder is 4 feet from the wall.

Answer 1

Answer:

$\sqrt{416}$ ft

or about 20.396ft when rounded to the third decimal place

Step-by-step explanation:

(assuming the question is to find the ladder's length)

let "l" be the ladder's length

$20^{2} + 4^{2} = l^{2}$

$400 + 16 = l^{2} = 416$

$l = \sqrt{416}$ ft