Serlio 3
| 1 | Draw the squares 1EF4 and E23F. |
| 2 | Define the centers G and H of both squares. |
| 3 | Construct the circular arcs from 1 to 4 with midpoint G and from 2 to 3 to midpoint H. |
| 1 | Draw the squares 1EF4 and E23F. |
| 2 | Define the centers G and H of both squares. |
| 3 | Construct the circular arcs from 1 to 4 with midpoint G and from 2 to 3 to midpoint H. |