90: ISOCELES PLAN. A CIRCUMFERENCE IS DRAWN IN A SQUARE AND DIVIDED INTO TWENTY-FOUR EQUAL PARTS. A CIRCUMFERENCE, CONCENTRIC TO THE FIRST, COMPLETES THE ROSETTE BY MEANS OF DIAGONALS. THE SMALL HEXAGON AND THE OCTAGON ARE TRACED.
91: DESCRIBE CIRCUMFERENCE AND DIVIDE INTO TWENTY-FOUR EQUAL PARTS. THE REGULAR DODECAGON IS DRAWN. THE INNER AND OUTER STARRED DODECAGONS ARE DESCRIBED BY RADIATING LINES.
92: NET-WORK OF THE HEXAGON AND THE TRIANGLE. THE ROSETTE OF TWELVE POINTS SPRINGING FROM A STARRED DODECAGON IS ENCLOSED BY A HEXAGON, TRELLISED, FROM WHICH THE tricèles ARE DRAWN.