I do not want layers, and I don't have "triangle head", is it inevitable? Or can I cut normal?
I have a different texture than you, but I stopped getting layers a couple of years ago. I just got sick of it! Now it's a little past my shoulders (dry) and I haven't had any problems with having pyramid or triangle shape to my hair. I'm relieved because I was so sick of having layers. Give it a try, you can always cut in layers if it doesn't work out.