Click on the desired center. Draw a circle. Click on the starting point of desired circular arc.

Movement to the right or left. Click on the end point of circular arc.

Circular arc is displayed. (Movement has been made to the right.)

Other half of circular arc. (Movement has been made to the left.)

For a centered second circle, the snap point in the center of circle is selected

Second circle exactly centered

Polygonzug

Polygonzug Ergebnis

Two circular arcs shall be joined with a polygonal chain.

Snap point selected as starting point of the polygonal chain

Using Ctrl and snap point the connecting line succeeds easily.

Still two more lines at the free end of circular arc...