Geometry Playground is a free ruler and compass Java application for multiple geometries.

Follow the instructions to download and launch Geometry Playground.

Geometry Playground has been translated into 10 Languages. To have it in your own language follow the contributors guide for changes to the source/Messages.properties file.

Barebones basic instructions for Geometry Playground are listed below:

1. Choose a geometry by selecting a tab.
2. Using the menus, choose what you want to do. You probably want to begin with the Construct menu.
3. Once you have chosen what you want to do, instructions for how to accomplish that should appear at the bottom of the screen.

The command to "move stuff around" can be found in the Manipulate menu: Transform is the command.

More in-depth instructions can be found in the accompanying wiki pages.

There are some constructions of some traditional Euclidean constructions and their counterparts in other geometries. These constructions are integrated into this repository.

For contributing improvements to Geometry Playground or additional constructions, please submit a pull request.

Geometry Playground was featured in the Mathematical Association of America's Loci Heath, Daniel and Joshua Jacobs,“Geometry Playground”, Loci (September 2010), DOI: 10.4169/loci003567.

The original Java version of Geometry Playground is written by D. Heath and J. Jacobs.

Language translations have been performed by many individuals including:

• Arabic:
  • Feryal Alayont
  • Rachid Benkahlti
• Chinese:
  • Yachuan Yu
  • Xioquian Zhang
  • Qiang Zheng
• French:
  • Guillaume Lajoie
• Hungarian:
  • Laszlo Miklos Lovasz
• Italian:
  • Jeffrey Weeks
• Japanese:
  • Daniel J. Heath
  • Yumiko Heath
  • Hideto Tsutsui
• Korean:
  • Hyun-Jong Song
  • Matthew Kim
• Marathi:
  • Ajit Datar
• Russian:
  • Natalya Manko
  • Daniil Perebeynos
• Spanish:
  • Erlinda Cano
  • Laura Matrajt