| Because the slices are thin, the height of the rectangle is approximately the radius, r, of the circle. |
| The main room was a rectangle with various antechambers and vestibules branching off down its length. |
| Start with a square and add a square of the same size to form a new rectangle. |
| The other pool was a plain old rectangle with some swimming lanes, diving boards and water nets. |
| Let's start with a rectangle, and then remove a square from it with the same side length as the shortest side of the rectangle. |
| If your walls are meeting at true right angles so that the room is a perfect square or rectangle, you can omit this step. |
