Is to let you cut out two squares, so that the sum of the squares of the sides of the two squares adds up to five. The answer is not unique. The simplest one is the square of Pythagorean Theorem 3+the square of 4 = the square of 5. There are many ways. Cut one side into a semicircle with a diameter, take a little from the semicircle and connect it. The acute angles are 37 degrees and 53 degrees respectively (consistent with the above answer, one is 3 and the other is 4). Then the small right-angled side is a square with a side length of 3, and the large right-angled side is 4. That's what it means.