T
H
E

E
L
E
M
E
N
T
S
Book VI   Proposition 29
But
    GH is similar to EL;
therefore
    MN is similar to EL; [VI.21]
therefore
    EL is about the same diameter as MN. [VI.26]

Let
    the diameter FO be drawn,
and
    let the figure be described.
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