From Keystone Fold in half, parallel sides of a trapezoid Cut the top half, a rectangle, and then bring the bottom half, a rectangle as well. To get into a rectangle 2. From recipes rectangle
the trapezoid Fold the top half of the parallel trapezoid. Cut top half into a rectangle and then the bottom half into a rectangle as well. It has a rectangular-shaped two. Formula squares
From the trapezoid. Fold the parallel side of trapezoid. Cut in half on a square and then the lower half to be rectangular. Can be rectangular 2 picture recipes from the square.