Part C
Write an expression for the area of square 4 by combining the areas of the four triangles and the two squares.

Part D
Write an expression of square five by combining the areas of the four triangles and the one square.

Part E
Since the areas of square four and five are the same, set the two expressions equal.

Part F
Which term is on both sides of the equal sign? Since it’s on both sides of the equal sign, you can cancel it out. What is the expression after cancelling out the common term?

Part G
What does the equation show after you cancel out a common term?