A rectangle is \(12\) units wide and \(20\) units long.

We want to tile the entire rectangle under the following conditions:

1. We can only use one size of square tile for the whole tiling project.
2. Only whole tiles can be used without leaving gaps. 

What size of tiles work?

Choose a tile size to see what one tile of that size looks like in the rectangle.​

Imagine tiling the entire rectangle using only tiles of that size.