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Traza de un rosetón
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(www.newyorkcarver.com/geometry/rose.htm)

 

Set out baseline A-B. Bisect it to find the vertical center line.

Construct the rise B-C equal to A-B. Spread out your compass to the length of A-B and, with the needle on point B, construct arc A-C. Where it intersects with the vertical is the center point, D.

From D, spread out compass to A and construct a complete circle. Now with compass spread out to the length of A-B, step around the circle to find the six sides of the hexagon.

Now bisect the walls of the hexagon into 12 parts as shown.
To 'slice up the pie' draw the diagonals as shown. To begin
the first rosette, construct a small circle around the center.
Use the smaller circle as a center line to inscribe
smaller circles within each segment.
Remove the unnecessary scribe lines to reveal the first
rosette. Now from the main center point, inscribe a border.

Next, the process is repeated on a larger scale - with
another circle inscribed for the main rosette. Bisect the diagonals to find center points.
From the center points, inscribe larger circles as shown.
Remove the scribe lines to reveal the larger 'petals.'
The completed rose window.

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