Version 3.9 of MathGraph32 fixes some minor bugs.
Thanks to Luis Belcredi a library of constructions on conics is available. Use menu Constructions - Use predefined construction and open the library named Conics.
Conics are not specific objects (they are point locuses).
Download on this page.
Here is a simple example using this library.
Create a new figure and 5 free points with icon .
Use then menu item Constructions - Use predefined construction and open the library named Conics. Click on the construction named Conic through 5 Points then click on Open. Click then on each of the 5 points.
The conic appears (it is a point locus created by the construction).
Now use tool to create a point linked to the conic.
Again use menu item Constructions - Use predefinied construction and open the library named Conics. Click on the construction named Tangent To Conic At Point then click on the conic and the point. The tangent appears.
Here is the figure. You can capture all the points.