An Introduction To Non-Euclidian Geometry

Physics Playground!

Play with shapes and the forces of physics

– Left-click to drag points. (corners, joints etc)      
– Right-click to delete a point
– Hold ctrl to enter edit mode, release to exit. 
When in edit mode:
 – Click to add points, hold alt to make fixed points.
– New points will join to the last point by default.
– Press shift to unselect a point.
– Select any two points to join them.