82’ THE RADIUS OF THE CIRCUMFERENCE IS EQUAL TO A THIRD OF THE HEIGHT OF THE TRIANGLE, AND THE SQUARE MAKES A STAR OF FOUR POINTS AT EACH ANGLE.
83 DRAW CIRCUMFERENCES AND DIVIDE AS IN PLAN. THE STARRED DODECAGON DETERMINED BY INTERTWINED SQUARES. THE LINES OF THE DODECAGON, EXTENDED AT INTERVALS, FORM A STAR OF FOUR POINTS.
84 DESCRIBE CIRCUMFERENCES AS IN PLAN. FROM A CENTRE AN INNER AND OUTER STARRED DODECAGON, THE LINES OF WHICH EXTENDED FORM A STARRED AND REGULAR HEXAGON, INCLUDING A STARRED OCTAGON WHICH MERGES INTO A CRUCIFORM FIGURE.