I used this student geometry set for precise drawing.

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Use the protractor and draw the largest circle you can on your paper.

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3

Like this.

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Now use a straight edge and draw a line down the center of the circle.

5

Like this.

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Now turn the circle a quarter turn and draw a line down the center again.

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You now have a circle with 4 equal parts. You need 12.

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You can eyeball it, or use a protractor and mark the paper at 30, 60, 120 and 150 degrees. Flip the paper around and repeat.

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Like this.

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11

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Now using the triangle, draw a line from one side to the other side of the circle connecting the corresponding marks.

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When you are finished, it should look like this.

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Now create a pattern in ONE triangle.

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Get a piece of tracing paper and lay on top of design and draw it with a pen.

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It will look like this.

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TURN OVER the tracing paper and get a soft lead pencil and completely cover the back side of the tracing paper where there is drawing.

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Like this.

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Flip the drawing face up and line up the pattern to the center tip and the edge of the pie. Trace with a pencil. It will leave a print of the pattern.

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Continue this around the circle.

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Use a soft hand when tracing, the paper is super fine and tears easily. If you are careful, you should be able to get all 11 tracings off the one pattern!

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Your circle should now look like this.

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Using your red pencil, choose a section to start with and color the piece. I chose to only color the negative space of this piece. I will only color the positive drawing in the next piece.

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After red comes red-orange, then orange, then yellow-orange, then yellow, then yellow green. You don't have to alternate the coloring of the pieces, but I like the result.

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The remaining six colors are green, blue-green, blue, blue-violet, violet, and red-violet. You could stop there... Or....

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Choose the complimentary color (the color directly across on the color wheel) and color in the empty space on the pie.