Question

A 20 ft ladder leans against a wall. The base of the ladder is 5 ft from wall. How high up the wall does the top of the ladder reach? a)19.4
b)20.6
c)375
d)15 ft​

Answer 1

Let h = height
h square = 20 square + 5 square
h square = 400+ 25
So you square root both sides
h = root 425
h = 20.6155281