8.1
Using the square as unity with both its side and area equal to 1, by
crossing the Ö2 with the (Ö5)/2 and leading a perpendicular from the point of
interesection up to the side, we divide unity into 1/3 and 2/3.
Arithmetic proportion:
1/3, 2/3, 1
Have a
go!
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8.2
Use the square for unity and by means of an arc from the lower left
corner,,, bring the length of side 1 down to intersect with the diagonal
Ö2. Then lead an arc from the upper right
corner back up to the upper side of the square.
Harmonc proportion:
(Ö2-1), (2 - Ö2), 1
Have a go!
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8.3
Lead an arc from the point of intersection of the half-side with the
semi-diagonal and the arc with radius equal to the half-side to the upper side
of the square.
Geometric progression:
1/f², 1/f, 1
Have a
go! |
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