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