Use acetate to line the cardboard ring, to give the sides of the concrete a smooth finish.
Cut the dowel into three pieces at 24” each, using the miter saw. Now sand each leg with #220 grit sandpaper.
Next, you will cut both ends of each leg so that they are parallel to each other. First, you’ll need a reference line, so place the leg between two long points or a groove so that it doesn’t roll.
The legs will be equal distances apart, in a shape of the triangle, so we need to draw an equilateral triangle.