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9.1 Laying Pipes under a Tiled Floor > 9.1 Laying Pipes under a Tiled Floor - Pg. 173

ALL APPROXIMATIONS ARE RATIONAL 173 (b) (a) Figure 9.1. Laying pipes under a tiled floor. quite wrong when he claims that `irrationals are uninteresting to the engineer'. In section 10.11 the difference between rational and irrational numbers turns out to be crucial. We shall begin this chapter by explaining what rational numbers are and then go on to detail some applications. To introduce and illustrate these ideas we have to resurrect the fiction of the thin line. 9.1 Laying Pipes under a Tiled Floor