Khan/khan-exercises — Issue #14578: Angle bisector theorem - Pythagora does not agree
Author: KhanBugz
Created: 2012-02-24 12:27:54+00:00
State: open
Labels: chrome, wrong-or-unclear

Reporter: alexaandru@gmail.com

I tried to solve the problem by using Pythagora's formula. As 45+45=90 degrees, that is a right angle, and the problem should be solvable using that formula. If we use the formula however, we get square root of (7.5*7.5 - 5.6*5.6) = 4.9889878733 which is very different from 5.2

Since this is one and the same triangle, regardless of what method we use to determine AB we should get the same value.

[angle_bisector_theorem.html?seed=100&problem=AB](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/angle_bisector_theorem.html?seed=100&problem=AB&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/angle_bisector_theorem.html?seed=100&problem=AB&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%224.9889878733%5C%22%22%2C102%5D%2C%5B%22hint-activity%22%2C%220%22%2C1%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%5D)

["4.9889878733"]

Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.7 (KHTML, like Gecko) Ubuntu/11.10 Chromium/16.0.912.77 Chrome/16.0.912.77 Safari/535.7

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