No class on March 26
Construct the part of the cylinder
x^{2} + y^{2} = 1 lying between the planes z= 1 and z = x. 
Combine the above surface with its reflection across the plane x = z to form this model. 
Join four cylinders of the same size symmetrically as thus: 
Join eight cylinders of the same size symmetrically as thus: 
Join six cylinders of the same size symmetrically as thus: 
Construct three mutually orthogonal "golden rectangles" whose 12 vertices form a regular icosahedron. Let £n denote the golden ratio £n = . the vertices may be placed on [+£n, +1, 0], [0, +£n, +1], [+1,0, +£n]. ¡@ 
Join 12 cylinders of the same size symmetrically as thus: 
Let
£n
denote the golden ratio
£n = . Illustrate this interesting fact: the points [+£n, +£n^{1}, 0], [0, +£n, +£n^{1}], [+£n^{1}, 0, +£n], [+1, +1, +1] comprise the vertices of a regular dodecahedron.

Construct the small stellated dodecahedron using the library geom3d:  Construct the small stellated dodecahedron using the library plottools: 