T H E E L E M E N T S |
Book VI Proposition 24 | |
But it was proved that, as CF is to FA, so also is BE to EA; therefore also, as BE is to EA, so is DG to GA, and therefore, componendo, as BA is to AE, so is DA to AG, [V.18] and, alternately, as BA to AD, so is EA to AG. [V.16] Therefore in the parallelograms ABCD, EG, the sides about the common angle BAD are proportional. |
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