Khan/khan-exercises — Issue #13120: Angle bisector theorem - Need video explaining
Author: KhanBugz
Created: 2012-02-05 18:56:59+00:00
State: open
Labels: hard, ipad, safari

Reporter: rizean@USA.net

Using Pythagorean theorem we can find the length of AD. Again using Pythagorean we can find the length of AC. We could also sqrt(AB^2+(BD+DC)^2) = AC. All different answers none of which agree with angle bisector theorem.

[angle_bisector_theorem.html?seed=11&problem=AC](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/angle_bisector_theorem.html?seed=11&problem=AC&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/angle_bisector_theorem.html?seed=11&problem=AC&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%227.7%5C%22%22%2C62%5D%2C%5B%22hint-activity%22%2C%220%22%2C21%5D%2C%5B%22hint-activity%22%2C%220%22%2C22%5D%2C%5B%22hint-activity%22%2C%220%22%2C29%5D%2C%5B%22hint-activity%22%2C%220%22%2C32%5D%2C%5B%22hint-activity%22%2C%220%22%2C36%5D%2C%5B%22hint-activity%22%2C%220%22%2C39%5D%5D)

["7.7"]

Mozilla/5.0 (iPad; U; CPU OS 4_3_5 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5

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