Khan/khan-exercises — Issue #6735: Angles 2 - I think answer is wrong
Author: KhanBugz
Created: 2011-11-20 04:40:44+00:00
State: open
Labels: chrome, lion, wrong-or-unclear

Reporter: dkam136@gmail.com

angle BAD and and angle ABC are alternate interior angles and so both should be 53. Line FC is a straight line, so angle BAC, DAB and FAD should be equal to 180. Thus 107 + 53 = 160, so FAD could also logically equally 30, which means the angles are incorrect.

[angles_2.html?seed=3&problem=opp-alternate-interior](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/angles_2.html?seed=3&problem=opp-alternate-interior&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/angles_2.html?seed=3&problem=opp-alternate-interior&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%2230%5C%22%22%2C25%5D%2C%5B%22incorrect-activity%22%2C%22%5C%2230%5C%22%22%2C39%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22correct-activity%22%2C%22%5C%2220%5C%22%22%2C21%5D%5D)

["30","30","30","20"]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.8 (KHTML, like Gecko) Chrome/17.0.943.0 Safari/535.8

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