When I made the Stack -n-Whack quilts, I used the line on my 6 x 24 ruler to cut the sections.
I pressed the seams open --nice and flat -- and the book said, do not cut off the dog ears, as they are used to line up the wedges and matching.
Those people who pressed to one side and snipped off the dog ears had problems. Not exactly what you are asking, but I thought I would share my experience on something similar.

I am not sure I like the blunt tips on some of my specialty rulers.
I'm curious what others have to say.

I love quilting, but geometry is not my strong point.... I doubt this will be helpful, but I have one of the triangle rulers you describe and I've found it works very well for me with equilateral triangles ... Comes out perfectly when piecing...now I've not tried hexagons and don't think I'll go there until I have a specific ruler to help me!

Marsha...to answer your question, I like the triangle ruler, but also know I would be challenge to use another method. It's like the easy angle, once I started using it, I can't use other methods for cutting HST!

Perhaps Toolgranny can weigh in on your question, she was able to Quickly see the light on octagons recently...

V.

Yes, Engineer Toolgranny will know.

Re the blunt tipped rulers: I'm still working on using/liking them.

I will say this though, I've become more proficient at math terms since quilting. I was not good at math in school beyond general addition, subtraction, multiplying and division.

SharonG/FL