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



rb
Posts:
5
Registered:
2/19/08


Re: Geometry Problem
Posted:
Feb 19, 2008 10:28 AM


> Carl Barron wrote: >> Kaba wrote: > >>>> 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. >> consider triangles BDC and ECD and their angles as well as >> intersecting and straight lines. Pretty easy no real equations >> just bookkeeping.... > > Sorry, but I cannot follow your steps. > [CUT]
Neither can I...



