Sometimes for folding a model it is required to postpone the angles multiple to 15 degrees. Such task has arisen for me, when I folded the model of the bush.

Finding off of the angles in 30 or 60 degrees do not represent problems. It is enough to construct on the side of square the equilateral triangle. For this purpose at first we shall divide the square by vertical crease into two equal rectangulars. Then we shall fold crease, which transfers a corner of a square on the marked line.

The angle in 15 degrees now can be received by dividing the angle in 60 and 30 degrees in half.