Homework Help: Math

Posted by Raymond on Saturday, December 3, 2011 at 10:57am.

A 20 foot ladder is leaning against the side of a building. The bottom of the ladder is 4 feet from the wall. How many feet above the ground does the ladder touch the wall?

Math - Ms. Sue, Saturday, December 3, 2011 at 12:46pm
The ladder, the ground, and the wall make a right triangle. Use the pythagorean theorem to find the height.

a^2 + b^2 = c^2

a^2 + 4^2 = 20^2

a^2 + 16 = 400

a^2 = 384

a = 19.5959
Math - roy, Monday, June 11, 2012 at 6:46pm
16

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