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Durer's Estimated Trisection

© Copyright 2003, Jim Loy

This interactively demonstrates an estimated trisection by Durer in about 1525. It is very accurate. Change the angle by moving the red dot. See Trisection of an Angle for a description of how this construction is done.

Please enable Java for an interactive construction (with Cinderella).

The above Java interactive demonstration was created with Cinderella (a geometry program).


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