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Use a ribbon to mark a 30-degree spiral around the tree. Use a protractor and a piece of chalk to mark a 30-degree upward angle to the left of the starting point. Tack or tape one end of a piece of ribbon or string at the starting point, then wrap it in a 30-degree upward, clockwise spiral around the tree. Tack or tape the ribbon/string at the point where it is in vertical alignment with its starting point (meaning it has spiraled around the tree trunk precisely once), then cut off any remainder.Use a protractor and a piece of chalk to mark a 30-degree upward angle to the left of the starting point. Tack or tape one end of a piece of ribbon or string at the starting point, then wrap it in a 30-degree upward, clockwise spiral around the tree. Tack or tape the ribbon/string at the point where it is in vertical alignment with its starting point (meaning it has spiraled around the tree trunk precisely once), then cut off any remainder.
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