Khan/khan-exercises — Issue #13545: Vertical angles 2 - Got a negative result
Author: KhanBugz
Created: 2012-02-10 12:11:35+00:00
State: open
Labels: chrome, hard, win7

The answer is a negative angle. Which doesn't seem to be proper at this stage of geometry.

[vertical_angles_2.html?seed=170&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/vertical_angles_2.html?seed=170&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/vertical_angles_2.html?seed=170&problem=0&debug&activity=%5B%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C7%5D%2C%5B%22hint-activity%22%2C%220%22%2C9%5D%2C%5B%22hint-activity%22%2C%220%22%2C12%5D%2C%5B%22hint-activity%22%2C%220%22%2C14%5D%2C%5B%22hint-activity%22%2C%220%22%2C16%5D%2C%5B%22correct-activity%22%2C%22%5B%5C%22-16%5C%22%5D%22%2C29%5D%5D)

[["-16"]]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.46 Safari/535.11

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