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Topic: Geometry Problem
Replies: 17   Last Post: Feb 20, 2008 10:04 AM

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none@here.com

Posts: 381
Registered: 3/31/05
Re: Geometry Problem
Posted: Feb 18, 2008 5:29 PM
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> Hi all,
>
> I need help with this problem:
>
> http://img180.imageshack.us/img180/8286/20080218181526nq7.gif
>
> The angle to find is ECD.
>
> The matter is solving it without trigonometric functions.
> With trigonometry or by drawing it you can see that the angle to find
> is 20° (sessagesimal) but I can't find it using a simple solution
> (properties of triangles, the parallel postulate and so on).
>
> Can you solve it?


Interesting problem, couldn't solve it either. I get 4 unknowns but only
3 linearly independent equations.

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