/usr/lib/python2.7/dist-packages/geographiclib/geomath.py is in python-geographiclib 1.21-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/geographiclib/../../../../share/pyshared/geographiclib/geomath.py