How to plot all the triangles?

Im trying to plot all the possible triangles on the graph, where 0<a<2. How would one go about doing that? Is there no way but to manually type in a=0, a=0.0001, a=0.0002, etc?

You could make a list for a, but it might give you a “list within a list” error:


There is a limit to the number of elements (characters?) in a list.

I’m guessing there is a better way because this ends up showing layers that makes it obvious that I didn’t use triangles, but maybe it’s good enough for your needs.