Construct Circular Fillet
Used to construct a circular fillet (arc) between two elements (lines, line strings, circular arcs, circles, or shapes), two segments of a line string, or two sides of a shape.
When you construct a circular fillet between two segments of a line string, the line string is broken into two independent line strings and arc. When you construct a circular fillet between two sides of a shape, the shape is broken into a line string and an arc.
You can access this tool from the following: