Trisecting a Line Segment (in world record speed!)

Index of Trisection Pages

Opening Page with Coble's construction  
          Picture Proof

2 Circles 3 Lines   
          Picture Proof

3 Circles 2 Lines 
          PictureProof

4 Circles
          Picture Proof 
          proof that three circles not enough
          proof that two circles and a line not enough

Mohr-Mascheroni
          Picture Proof
          proof that seven circles are needed

Poncelet-Steiner
          Picture Proof
          proof that eight lines are needed

Trisecting Angles

Instructor's Guide (Word doc)

Annotated References (including an email stating how carpenters trisect line segments.) 
         

            Villanova Home Page       Opening Trisection Page  revised 26 June 2003