John has a 20-foot ladder leaning against a wall . In order to complete the paint job on a sign on a wall, he needs the ladder to go at least 15ft up the wall . What angle(s) does the ladder need to make with the ground to make this possible? What angles would not work?

i d k

Step-by-step explanation:

hi there!

step-by-step explanation:

a roof pitch is basically for every inch rise there is 12 inches run.

the height of the roof is also known as the rafter.

formula: rafter^2 = rise^2 + run^2

rafter^2 = 5^2 + 12^2

rafter^2 = 25 + 144

rafter ^2 = 169"^2

the height of the roof from the lowest point to the highest point is 169"^2.

hope this : )