Hi Andy, you probably noticed that this problem was similar to one you did in class, but this one has less information. In fact we gave you MORE information than necessary for the in-class problem and you do have enough information for 2.24.

As a hint, there are 3 squares that make up the bottom of the full rectangle and only 2 squares that make up the top. Since these two sides have the same length, you can use that to your advantage.

Let us know if you have any more questions or would like more of a hint!