Khan/khan-exercises — Issue #11813: Parallel lines 2 - Negative angle
Author: KhanBugz
Created: 2012-01-22 06:12:00+00:00
State: open
Labels: chrome, win7, wrong-or-unclear

Is there such a thing as a negative angle? Wouldn't angles be absolute values?

[parallel_lines_2.html?seed=51&problem=0 (alternate_interior_angles_2)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/parallel_lines_2.html?seed=51&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/parallel_lines_2.html?seed=51&problem=0&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7

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