FROM TRIANGLE TO SQUARE !

The problem of haberdashery (Haberdasher's puzzle) is to cut a square into four distinct parts that can be rearranged to form an equilateral triangle. This problem was proposed and solved by Henry Dudeney in the early twentieth century. Furthermore, placing four hinges between the surfaces forming the original shape, the transformation is quite dynamic.

Based on this problem, a  Company decided to designed a house that can perform this transformation offering different configurations depending on the season. You may see it in the video attached below.