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as AB is to BC,
so is DC to CE,
and,
as BC is to CA,
so is CE to ED;
therefore, ex aequali,
as BA is to AC,
so is CD to DE. [V.22]
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T H E E L E M E N T S |
Book VI Proposition 4 | |
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Since then it was proved that, as AB is to BC, so is DC to CE, and, as BC is to CA, so is CE to ED; therefore, ex aequali, as BA is to AC, so is CD to DE. [V.22] |
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