T H E E L E M E N T S |
Book VI Proposition 6 | |
Let ABC, DEF be two triangles having one angle BAC equal to one angle DEF and the sides about the equal angles proportional, so that as BA is to AC, so is ED to DF; I say that the triangle ABC is equiangular with the triangle DEF; and will have the angle ABC equal to the angle DEF, and the angle ACB to the angle DFE. |
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