Curve of pursuit

Aristarchus' mistake

Perpendicular fitting

Archimedes Pi

Cartesian and non-Cartesian cars

Dragging test

A rectangle, rhombus, parallelogram and trapezium.
The main feature of dynamic (or interactive) geometry is that you should be [br]able change a geometrical object without changing the significant properties of the object. In the applet above, you can change the shapes but they are always a rectangle, rhombus, parallelogram and trapezium.

Interactive GeoGebra logo

Drag the points!

Information