In the figure below, three circles of radiii: **
a**,
**b**,
** c**
are
mutually
tangent to each other and a line. Prove that:
.
References: Fukagawa Hidetoshi, Tony Rothman, "Sacred
Mathematics: Japanese Temple Geometry" (Princenton
University Press, 2008).
See
also:
Geometry problem 1154
Geometric art
version 1 |