You were asked to sketch some designs for pool that requires tiles around its edges. These are the sketches ......
1 foot long needs four square tiles
2 foot long needs six square tiles
3 foot long needs eight square tiles
How would do these designs?

Because you did not give the exact problem completely, I am forced to guess that the square tiles have an area of one square foot, the pool is rectangular, and every inch of the sides of the pool must be adjacent to a tile.

If those guesses are correct, what ideas do you have?