Geometry app

[parisse]

(09-26-2019 05:46 AM)Tugdual Wrote:  

(09-25-2019 01:25 PM)parisse Wrote:  What's wrong with using a rotation in this case?
By the way, you can create your own CAS function and use it in the geometry app, but I can't imagine something simpler than using a rotation.

The rotation clones an existing object and providing that the app is quickly bloated with too many objects (even on a G2) this is not desirable.

I don't understand what you mean. You can create your new line with exactly one command: new_line:=rotation(point_on_line,angle,line). How can it be simpler?
Maybe you are used to other geometry app, and you don't like the philosophy ot the Prime geo app, but please consider that it's your point of view, it's not something intrinsic.
The Prime geometry app is an analytic geometry app (like Geogebra is), you build your construction exactly like you would make a program to compute something with scalars, except that here you will have all intermediate objects displayed. And you can do *exact* analytic geometry, something you will not find on other geometry apps (at least on a calculator), that means you can *prove* geometry theorems.