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Step 1
Open a new four by four inch document in Illustrator. Set your unit measurement preferences to inches and choose "Show Rulers" from the View menu. Drag horizontal and vertical guides from the ruler to document center of your document. Drag a second vertical ruler to the three-inch mark.
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Step 2
Choose the rectangle shape tool and with no stroke (you can use any fill color you want). Drag a rectangle from the center guides to the three-inch guide at the top right center of the document.
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Step 3
Convert the rectangle to a triangle. Choose the "Delete Anchor Point Tool" and click on the bottom right rectangle corner. The bottom of the rectangle will snap into a single point.
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Step 4
Create irregular shapes along the edges and the inside of your triangle using the pen tool, or any of the shape tools. You will use these to cut out pieces of the triangle in a minute, so think about where and how you want to place them. Trim corners, overlay circles onto the sides or cut wedges.
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Step 5
Select all of your shapes (make sure the "Lock Guides" option is on so that you don't select your guides as well). Click on the "Subtract From Shape Area" button in the Pathfinder palette the click on the "Expand" button. Illustrator will cut the shapes from your triangle.
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Step 6
Click on the Rotate tool in the Toolbar. Hold down the "Option" key and click the bottom left corner of your rectangle to open the rotate dialogue. Set the rotation angle to 30-degree and click on the "Copy" button. A copy of your shape will appear 30 degrees from the selected point.
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Step 7
Hold down the "Command" and "D" keys to rotate your snowflake in a full circle. Your snowflake will appear.
