Khan/khan-exercises — Issue #14904: Quadrilateral angles - "This figure is a trapezoid", but not enough information given
Author: KhanBugz
Created: 2012-02-29 02:10:25+00:00
State: open
Labels: lion, safari, wrong-or-unclear

Reporter: peterb@gmail.com

In this question, what is presented as given is a quadrilateral, with one angle, and four sides all of differing length. The hints in the answers declare "This figure is a trapezoid", but since there is no indication that at least one pair of sides are parallel, the user is not warranted in making that assumption. The question or the diagram should state that at least one pair of sides are parallel.

[quadrilateral_angles.html?seed=189&problem=trapezoid](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/quadrilateral_angles.html?seed=189&problem=trapezoid&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/quadrilateral_angles.html?seed=189&problem=trapezoid&debug&activity=%5B%5B%22correct-activity%22%2C%22%5C%22151%5C%22%22%2C1577%5D%5D)

["151"]

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