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A painter is placing a ladder to reach the third story window, which is 20 feet above the ground and makes an angle with the ground of 80°. How far out from the building does the base of the ladder need to be positioned?

 Feb 25, 2020
 #1
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We can use the tangent to  solve this

 

tan (80°) =    20  / D                    where D is the distance  we  need

 

Rearrange  as

 

D  = 20  / tan (80“)   ≈   3.5 ft     [ this is reasonable because the ladder  is at a  steep angle with the ground ]

 

 

 

cool cool cool

 Feb 25, 2020

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