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?

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asked Jun 1, 2018 49.1k views

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Sherwin Zadeh · Answer 1 · 2018-06-05T01:02:01+0000

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

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?

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