17 FROM THE APICES OF THE TRIANGLES OF DIVISION DESCRIBE CIRCUMFERENCES HAVING A RADIUS EQUAL TO ONE-THIRD OF A SIDE; SUB-DIVIDE THEM INTO TWELVE EQUAL PARTS, THEN TAKE THE DIAGONALS OF THREE IN THREE DIVISIONS. THE RADIUS OF THE CIRCUMFERENCES WOULD BE SMALLER OR LARGER THAN THE ONE-THIRD OF THE SIDE; AND THEN, BY MEANS OF AN ADJUSTMENT, THE SQUARES BETWEEN THE APICES WOULD HAVE A SIDE EQUAL TO THAT OF THE STARS.
18 DODECAGONS INTERSECTED BY EACH OTHER, WHICH ARE OBTAINED BY SUB-DIVISION OF THE ANGLES OF THE TRIANGLES INTO FOUR EQUAL PARTS.
