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they are also in the same ratio as the wholes,
that is
in such manner that the triangles are proportional, and ABE, EBC, ECD are antecedents, while FGL, LGH, LHK are their consequents,
and that
the polygon ABCDE has to the polygon EFGKL a ratio duplicate of that which the corresponding side has to the corresponding side,
that is
AB to FG.
For
let AC, FH be joined.
