There's an add-on called "mesh tiny cad" which is still included in the standard installation of Blender (2.79 and 2.8+).

• Pick any three vertices in Edit Mode
• RMB -> TinyCad -> CCEN,

You'll see a circle of verts which you can adjust (radius, num of new verts)

This add-on/operator doesn't care what orientation your three vertices has, it's not limited to X,Y or Z axis. It can be an arbitrary plane.

There's an add-on called "mesh tiny cad" which is still included in the standard installation of Blender (2.79 and 2.8+).

• Pick any three vertices in Edit Mode
• RMB -> TinyCad -> CCEN,

You'll see a circle of verts which you can adjust (radius, num of new verts)

This add-on/operator doesn't care about the orientation of your three vertices, it's not limited to X,Y or Z axis. It can be an arbitrary plane.

small documentation page for the add-on: https://zeffii.github.io/mesh_tiny_cad/

There's an add-on called "mesh tiny cad" which is still included in the standard installation of Blender (2.79 and 2.8+).

• you pick any three vertices
• press W -> TinyCad -> CCEN,

You'll see a circle of verts which you can adjust (radius, num of new verts)

This add-on/operator doesn't care what orientation your three vertices has, it's not limited to X,Y or Z axis. It can be an arbitrary plane.

There's an add-on called "mesh tiny cad" which is still included in the standard installation of Blender (2.79 and 2.8+).

• Pick any three vertices in Edit Mode
• RMB -> TinyCad -> CCEN,

You'll see a circle of verts which you can adjust (radius, num of new verts)

This add-on/operator doesn't care what orientation your three vertices has, it's not limited to X,Y or Z axis. It can be an arbitrary plane.