9.1
Draw a circle with radius OA and inscribe hexagon of side
OA=1. Draw a veertical diamter AB. Mark each apex of hexagon
with 1to 6. and draw in the diagonals 1-4, 2-5, 3-6. With
the midpoint C as centre and radius CA, draw arc to intersect
radius 0-2 at point 11. Line CA=5/2 and will divide radius
0-2 into the proportion 1/f
and 1/f². Draw circle with radius
O-11 and at the places where this circle interesects the
radii of the hexagon mark a point and designate with a
number 7 to 12. |
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