/usr/share/perl5/ is in libmath-polygon-perl 1.10-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/Math/Polygon/
/usr/share/perl5/Math/
/usr/share/perl5/Math/Polygon/Calc.pm
/usr/share/perl5/Math/Polygon/Calc.pod
/usr/share/perl5/Math/Polygon/Clip.pm
/usr/share/perl5/Math/Polygon/Clip.pod
/usr/share/perl5/Math/Polygon/Convex.pm
/usr/share/perl5/Math/Polygon/Convex.pod
/usr/share/perl5/Math/Polygon/Surface.pm
/usr/share/perl5/Math/Polygon/Surface.pod
/usr/share/perl5/Math/Polygon/Transform.pm
/usr/share/perl5/Math/Polygon/Transform.pod
/usr/share/perl5/Math/Polygon.pm
/usr/share/perl5/Math/Polygon.pod