Correction: The "T"
pin concept as presented in the recent
design is not correct - the scalene
triangle cannot be created this way.
"Close, but no cigar!" (of US origin
from the mid-20th century when
fairground stalls gave cigars as
prizes). But research still shows that
the scalene triangle - when drawn
precisely - squares the circle and its
diagonal sides facilitate the
drawing/squaring of two additional
circles.
Presenting the essential scalene
triangle of squared circle geometry,
suggesting that only three points
are required to square the circle:
- pivot point is at the top left of
the diagram.
- golden circle (diameter =
2,000,000 units) is given.
- green line at 45 degrees (length
unknown) is given.
- horizontal line at 0 degrees
(pivot line, length unknown) is
given.
- shortest side of the scalene
triangle = side of an inscribed
square.
- light blue arc is a portion of a
circle (radius = golden circle's
chord).
- dark blue arc is a portion of a
circle (radius = golden circle's
diameter).
- rotate golden circle and its chord
counter clockwise to create scalene
triangle.
- many lines shown cannot be drawn
until the rotation is stopped.
Thus both
circles, golden and dark blue, are
squared by the same Pythagorean
triangle (same angles): the area of
the square of the dark blue circle
is exactly four times the area of
the square of the golden circle. And
the golden "I" highlights two equal
line lengths: length of square's
diagonal (midpoint to midpoint) =
length separating the circle's two
chords (midpoint to midpoint).
This Scalene Progression design
finalizes this study and
commemorates Pi Day 2013 (now 10
trillion digits of Pi).
The design reveals that only 3
points are required to "square the
circle" (left side of green triangle
and of horizontal side reflect the
square roots of 2 and of Pi; large
circle's diameter = 1 million
units). The diameters are
decremented by half the square root
of 2: lengths from largest to
smallest = 1000000.0, 707106.781,
500000.0.
The red triangle provides a new "no
Pi" trigonometry formula for the
area of the circle. With a right
triangle having an hypotenuse as the
radius of a circle and the cosine
angle (near the circle's center) =
27.597112635690604451732204752339..
degrees, the trigonometry formula
becomes:
Area = ((cos
27.597112635690604451732204752339..
) x diameter) squared
Discussion:
That this cosine angle might
complement Pi digit-for-digit in a
perfectly squared circle ... and
that this Pythagorean triangle
exists in every squared circle ...
hints that Pi Day has always had a
certain Pythagorean ambience.
Perhaps, Pythagoras even
contemplated this right triangle's
always-present, geometric sibling: a
circle-squaring scalene triangle.
The lines in this Scalene
Progression design directly or
effectively square the four
circles.
This geometry and the supporting
trigonometry hint that squaring the
circle may be less "impossible" than
finding the limit of Pi digits.
After all, the three points of a
certain scalene triangle seem to be
a sufficient number on a circle to
determine its square (although 8
would be the maximum required since
a circle's square rests upon 8
points ... only).
Which leads us to this Pi Day
perspective: Some Pi are square,
some are round, but no Pi is
triangular.

Update 21/10/2013
I-Square method
The I-Square
method* is derived from analysis
that a squared circle has only 8
points of contact between the
circle and its square (plus
later conjecture that a solution
to "squaring the circle"
requires geometric association
of the square root of Pi and the
square root of 2). Completing
the square requires a few more
steps; complete the inscribed
square for better display of the
geometry.
Squaring the circle with a
protractor and compass (I-Square
method):
1. Draw a 45-degree angle with
the sides at 135 and 180
degrees.
2. Draw a center line at 152.4
degrees** from the vertex of the
angle.
3. Mark the length of the
circle's radius along the centre
line from the vertex.
4. Draw the circle with the
compass point at the left end of
the radius.
The two sides
of the 45-degree angle and the
vertex identify 3 points of the
circle's square and creates a
chord that has length equal to
the side length of the circle's
square.
This is not a
solution to the Greek challenge
of "squaring the circle" but
reveals the unique scalene
triangle that might help prove
that the circle is squared.
Another straight line drawn
between the two points, one on
each side of the angle, creates
a diagonal chord that has length
equal to the side length of a
square inscribed in the circle.
* "I-Square"
is a nickname referring to
"Impossible Square" which
alludes to popular belief that a
circle cannot be squared.
** Draw
centre line at
152.40288736430939554826779524767
degrees for best precision.
Precision can be increased
beyond this, complementing half
the square root of Pi
digit-for-digit (arc cosine
determines precise angle for the
unique right triangle:
62.4028873643.. degree radius,
90 degree left side, 180 degree
top side).
Tips:
1). Try a circle with a diameter
of 2 units (or 20, 200, 2000,
etc.) to correlate results
directly with half the square
root of Pi.
2). The 62.4028873643.. degree
radius also squares any circle
with simple geometry!
3). Math reference:
Input half square root of Pi
to calculate precise angle:
acos(0.88622692545275801364908374167057)
=
27.597112635690604451732204752339
degrees
Subtract from 90 degrees to
calculate angle of radius:
90 -
27.597112635690604451732204752339
=
62.40288736430939554826779524767
degrees
Add 90 degrees to calculate
angle of I-Square center line:
90 +
62.40288736430939554826779524767
=
152.40288736430939554826779524767
degrees
