CaR is an application designed for the creation and analysis of dynamic geometry figures simulating compass and ruler constructions on a computer, developed by Rene Grothmann. Its main use is to develop complex constructions so that their interaction can be studied.
Free dynamic geometry software
CaRMetal is a simplified version of that application that eliminates various intermediate steps, it offers a completely graphical interface (similar to the interface of a vector design application), allowing the user to make all kinds of complex mathematical operations like functions and area calculations.
The application is quite easy to use compared to other similar applications because once we insert points we can obtain any kind of figure in a matter of seconds (circles, lines, vectors, polygons, segments,...).
Thanks to macro-management, we can simplify the calculation and analysis of various figures at the same time if we have to repeat a process several times. If you're looking for a simplified graphic version of CaR, download CaRMetal, even better it's free.