Khan/khan-exercises — Issue #13681: Pythagorean theorem 2 - Not specified which is the right angle
Author: KhanBugz
Created: 2012-02-12 18:16:31+00:00
State: open
Labels: chrome, win7, wrong-or-unclear

Reporter: vyhoffman@gmail.com

This problem does not specify that the angle which *appears* to be a right angle is or is not the right angle. This could confuse students on in-class or standardized tests, where sometimes a drawing will deliberately be out of scale to throw them off if they're not paying close attention. Granted, in this case it would be extremely out of scale, but technically, the answer to this problem could be either 5 root 3 or 20 root 3, depending on whether angle C or A is the right angle. Just indicating the right angle in the drawing (or stating that the image is to scale) would resolve this.

[pythagorean_theorem_2.html?seed=1&problem=30-60-90-find-short-leg-given-hypotenuse](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pythagorean_theorem_2.html?seed=1&problem=30-60-90-find-short-leg-given-hypotenuse&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/pythagorean_theorem_2.html?seed=1&problem=30-60-90-find-short-leg-given-hypotenuse&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B15%2C1%5D%22%2C186%5D%2C%5B%22correct-activity%22%2C%22%5B5%2C3%5D%22%2C15%5D%5D)

[[15,1],[5,3]]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7

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