Geometric figures ellipse

Figure 16.2 The icosahedron (top) and dodecahedron (bottom) have identical symmetries but different shapes. Protein subunits of spherical viruses form a coat around the nucleic acid with the same symmetry arrangement as these geometrical objects. Electron micrographs of these viruses have shown that their shapes are often well represented by icosahedra. One each of the twofold, threefold, and fivefold symmetry axes is indicated by an ellipse, triangle, and pentagon, respectively.

The shape of the closed orbits also has an interesting physical interpretation. The orbits in Figures 5.1.3 and 5.1.4 are actually ellipses given by the equation 0) x + v = C, where C > 0 is a constant. In Exercise 5.1.1, you are asked to derive this geometric result, and to show that it is equivalent to conservation of energy. ... 

It is interesting to point out that the O-dependent refractive index, given in (5.28), geometrically describes an ellipse as illustrated in Figure 5.3. 

Aside from molecule objects, ChemEdit enables drawing of simple geometrical objects such as lines, circles, ellipses, arcs, polygons, and splines (Figure 8). An easy to use text editor is also provided. Text may be rotated to any... 

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