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the rectangle contained by AB, F,
be equal to
the rectangle contained by CD, E;
I say that
the four straight lines are proportional,
so that,
as AB is to CD,
so is E to F.
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T H E E L E M E N T S |
Book VI Proposition 16 | |
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Next, let the rectangle contained by AB, F, be equal to the rectangle contained by CD, E; I say that the four straight lines are proportional, so that, as AB is to CD, so is E to F. |
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