Thank you for your comments.
Some of your language confuses me, like: padded; nested closed paths; nesting.
I did not know that an essential part of the triangle was the circle. When I rounded the points, the “rounded” triangle” lost the circle. I did not know one had to tack it back to the circle.
I am sorry, the whole concept of the spread sheet linking into the drawing, is totally foreign to me. I have never come across this until this post.
I did try and constrain the triangles with measurements. Then ChrisB said I had too many constraints – so it seemed like I was between a rock and a hard place.
All your comments are great. Thank you. This is not my day job, but I do like the CAD. I have watched many videos, but even the basic one starts basic and in the second one launch into 3D. So I just get confused.
So I am trying practical things (like my PC front – my apologies for not telling you want is was), and working my way. Eventually I may get to 3D, but currently with all the comments it scared the pants of me.
Sorry for making a mess.
I am not even going to ask for guidance. Again I am sorry.