# 12.1 - 12-1 Similarity A The Idea of a Similarity...

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12-1 Similarity A) The Idea of a Similarity; Proportion a. Similarity i. Figures have the same shape but not necessarily the same size ii. Examples b. Proportional i. Given two sequences a, b, c, … and p, q, r, … of positive numbers. If then the sequences a, b, c, …and p,q,r,… are called proportional, and we write a,b,c,…~ p,q,r,… ii. The symbol ~ is pronounced “is proportional to”

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iii. example 2,3,4 ~ 4,6,8 This works because B) Theorem 12-1 a. Proportionality between sequences is an equivalence relation i.
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