1. Using squares 1, 2, and 3, and eight copies of the original triangle, you can create squares 4 and 5. Keep the square 4 and square 5 window open. You will need them to complete the rest of the tasks in this section. 2. What are the side lengths of square 4 and square 5 in terms of a and b? Do the two squares have the same area?
Write an expression for the area of square 4 by combining the areas of the four triangles and the two squares.

3. Write an expression for the area of square 5 by combining the areas of the four triangles and the one square.

4. Since the areas of square 4 and square 5 are the same, set the two expressions equal.