Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
Drexel University or The Math Forum.
|
|
mark
Posts:
202
Registered:
12/6/04
|
|
Re: Trisection
Posted:
Jul 18, 2002 1:44 PM
|
|
Steve wrote:
> I just did a 5-minute check with Geometer's Sketchpad. In one
>iteration (original directions only) it didn't do too well. My angle
>was 75 degrees. My guess for placing D was BD/BA=0.292.
>The angle E'OB comes out to be 25.562 degrees, 2% high.
> I think my construction is correct because as the first guess
>approaches 25 degrees, the construction result does also.
> But I agree that further tweaks might make it much better.
Steve:
I think there is something wrong with your construction.
I am assuming you were using 75 degrees as your unknown angle at point
A,(this is the original lettering), intended length AB=AC=1 and the
first guess radius from step 4 to be CD=.292 (I'm not sure why you
call it BD). My results using the above yield 24.996 deg.
Even if I do use BD=.292, (which is outside the first guess parameters
of the construction) I get 25.174 deg.
Please try again.
Mark.
|
|
|
|
