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Math Forum » Discussions » Math Topics » geometry.puzzles.independent

Topic: Trisection
Replies: 19   Last Post: Feb 11, 2012 9:59 AM

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Steve Gray

Posts: 129
Registered: 12/4/04
Re: Trisection
Posted: Jul 17, 2002 11:52 PM
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Mark wrote:

[snip]

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.

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