Khan/khan-exercises — Issue #9404: Parallel lines 1 - problem with the anwser
Author: KhanBugz
Created: 2011-12-23 20:14:17+00:00
State: open
Labels: chrome, hard, win7

it does not explain this

[parallel_lines_1.html?seed=119&problem=2 (same_side_exterior_angles)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/parallel_lines_1.html?seed=119&problem=2&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/parallel_lines_1.html?seed=119&problem=2&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.63 Safari/535.7

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