kig software package provides interactive geometry tool for KDE, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install kig
kig is installed in your system.
Make ensure the kig package were installed using the commands given below,
$ sudo dpkg-query -l | grep kig *
You will get with kig package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Mathematics |
| Package | kig |
| Version | 4:4.14.2-1 |
| Description | interactive geometry tool for KDE |
| Sub Section | Math |