Mathematics for Computer Science

Chapter 12 Planar Graphs490

(a) (b) (c)

Figure 12.13 The tetrahedron (a), cube (b), and octahedron (c).

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(a) (b) (c)

Figure 12.14 Planar embeddings of the tetrahedron (a), cube (b), and octahe-
dron (c).