T
H
E

E
L
E
M
E
N
T
S		 Book VI   Proposition 25
Therefore also,
    as the triangle ABC is to the triangle KGH,
    so is the parallelogram BE to the parallelogram EF;
therefore, aternately,
    as the triangle ABC is to the parallelogram BE,
    so is the triangle KGH to the parallelogram EF. [V.16]

But
    the triangle ABC is also equal to the parallelogram BE;
therefore
    the triangle KGH is also equal to the parallelogram EF.
Previous Page    Return to Propositions    Next Page