How to make 30 ° and 60 ° angles with a rectangular piece of paper?

How to make 30 ° and 60 ° angles with a rectangular piece of paper?

First, fold the square paper in half, then turn it into a rectangle, and then fold it along the diagonal line of the rectangle. The smaller angle is 30 ° and the larger angle is 60 ° except for the right angle~