geomview software package provides interactive geometry viewing program, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install geomview
geomview is installed in your system.
Make ensure the geomview package were installed using the commands given below,
$ sudo dpkg-query -l | grep geomview *
You will get with geomview package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Mathematics |
| Package | geomview |
| Version | 1.9.5-1+b1 [mips, mipsel], 1.9 |
| Description | interactive geometry viewing program |
| Sub Section | Math |