To the very very few that provide help thanks.
I kept this as simple as I could. There was no need to for me to provide prints, drawings, explain how i was going to build wall or say that I could drain the water from the lake/pond. I was not asking how to build, ideas or price it. I was asking how to lay out a radius without being able to use center point as reference. The fact it was a wall, sea wall or anything for that matter did not have any bearing on my question. I felt it was a fairly simple question, and I was just looking for some ideas that would make it go quicker.
The way it looks, most on here had to clue how to figure it out.