THE Z-SHAPED CUT
The carpenter needed to fill a hole in the floorboards. It was 2 feet wide and 9 feet long. Unfortunately, he only had one board, which was 3 feet wide and 6 feet long. It had the right area, but it was the wrong shape.
How could he cut the board into two pieces, which would then fit together to make a plank 2 x 9 feet?