Click the thumbnails to enlarge.

Example 2 (Figures 11.2.1.a and 11.2.1.b)

Theorem 2, Brouwer fixed point theorem (Figure 11.2.2)

Example 4 (Figure 11.2.3)

Theorem 3, The fundamental theorem of algebra (Figure 11.2.4)

Exercise 4, and Exercise 7 (Figures 11.2.5 and 11.2.6)