T H E E L E M E N T S	Book VI   Proposition 6
	Therefore the angle DFG is equal to the angle DFE, and the angle DGF to the angle DEF. But     the angle DFG is equal to the angle ACB; therefore     the angle ACB is equal to the angle DFE. And, by hypothesis,     the angle BAC is also equal to the angle EDF; therefore     the remaining angle at B is also equal to the ramaining angle at E; [I.32] therefore     the triangle ABC is equiangular with the triangle DEF.
	Previous Page    Return to Propositions    Next Page