Derousseau's Generalization of the Malfatti circles

\(a:b:c=231:250:289\).


Jump
[Guy]
[Lob & Richmond]
(0**)
(1**)
(2**)
(3**)

\(\mathbf{7b}\) \((323)\)

\(\displaystyle\overrightarrow{AA^\prime}=-\frac{33}{16}\overrightarrow{AI_B}\),   \(\displaystyle\overrightarrow{BB^\prime}=-\frac1{33}\overrightarrow{BI_B}\),   \(\displaystyle\overrightarrow{CC^\prime}=-\frac{12}{11}\overrightarrow{CI_B}\).
\(\displaystyle A^\prime=\frac{623}{480}:\frac{275}{144}:-\frac{3179}{1440}\),   \(\displaystyle B^\prime=-\frac7{270}:\frac{943}{891}:-\frac{289}{8910}\),   \(\displaystyle C^\prime=-\frac{14}{15}:\frac{100}{99}:\frac{457}{495}\).
7b (323)

Hiroyasu Kamo