Summer Session 8
      2000, July 27


8-1 Construct the torus using the command "tubeplot".



8-2 Construct two tori as thus:



8-3  Construct the torus using the command "plot3d".



8-4 Construct the torus by pasting two patches as thus:



8-5  Construct one half of a torus so its cross-section consists of two concentric circles.



8-6  Construct one half of a torus so its cross-section consists of two disjoint circles.



8-7  Construct one half of a torus so its cross-section consists of two intersecting circles

These circles are called Villarceaux circles. Reference: Z.A. Melzak, Invitation to Geometry, pp.
63-68.


8-8  Construct one half of a torus so its cross-section consists of two interlocking circles in space.



8-9  Construct a knot as thus:



8-10  Construct knots as thus:



8-11  Construct a twisted torus whose sections are formed by regular triangles: