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A ladder 20 ft long is resting against a vertical wall. The bottom of the ladder is 4 ft away from the wall. How high on the wall does the ladder reach?

1 Answer

5 votes
Think of this like a triangle...

The height is 20 ft. The width is 4 ft.

It should look something like this:
----------/|
---------/-|
20ft--/--| x ft
-------/---|
------/__|
--------4ft
User Sherwin Zadeh
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