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Topic: Geometry Proof (Valid Question?)
Replies: 4   Last Post: Sep 10, 2008 9:22 PM

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Rich Kleinschmidt

Posts: 31
Registered: 12/6/04
Re: Geometry Proof (Valid Question?)
Posted: Sep 10, 2008 9:22 PM
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I suspect that the original problem should have been AE=ED=DB=BC. Then there would be a very nice proof that the ratio of angles A & B is 1:3. You would use Isosceles Triangle thm and Exterior Angle of Triangle thm.

In order to draw such a diagram, angle A needs to be more acute than the one on the original diagram. (If AB=AC than angle A would be exactly 180/7.)

Rich Kleinschmidt

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