H
E
E
L
E
M
E
N
T
S
the ratios of K to L and of L to M are the same as the ratios of the sides,
namely,
of BC to CG and of DC to CE.
But,
the ratio of K to M
is compounded of
the ratio of K to L and that of L to M;
so that
K has also to M, the ratio compounded of the ratios of the sides.
