T H E E L E M E N T S |
Book VI Proposition 21 | |
For, since A is similar to C, it is equiangular with it and has the sides about the equal angles proportional. [VI.Def.1] Again, since B is similar to C, it is equiangular with it and has the sides about the equal angles proportional. Therefore, each of the figures A, C is equiangular with C and with C has the sides about the equal angles proportional; therefore A is similar to B. | ||
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