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I need a tool that is able to:

  • Draw 2D/3D geometric objects given the sufficient attributes (center, raduis for a circle, lower-left corner and side length for a cube etc.)
  • Show the intersection points of those objects.
  • Show the distance between some specific points (like intersections, centers, a point on a surface to another point etc.)
  • Let me modify the objects by drag&drop, wihout closing the initial window.

gnuplot is the best alternative so far, but it requires a spaghetti code for a little bit complicated cases.

Edit: I found Dr. Geo but it is not so useful and user friendly.

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up vote 8 down vote accepted

You can use GeoGebra:

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Exactly what I wanted! Thank you. But there are two different versions: one is on the website and other is in repository. Which one should I install? – cagirici Jun 30 '14 at 18:18
Glad it works for you. What repository? – Franck Dernoncourt Jun 30 '14 at 18:36
Ubuntu repository. Sorry, I forgot to mention the OS :) – cagirici Jun 30 '14 at 18:51
I'd go with the repo, just make sure the version you get is the latest one, i.e. GeoGebra 4.4! – Franck Dernoncourt Jun 30 '14 at 19:27
+1 for GeoGebra. I really like to use it both privately and to show things in class. I downloaded it from the website to make sure I got the latest version. – CompuChip Jun 30 '14 at 20:41

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