ACTIVITY 1 A square with length a is drawn on the following page. Work with a partner and follow the steps below: PART A 1. Write an expression representing the área of the square in terms of a. 2. Draw a square in the bottom left corner of the large square and call the length b. 3. Write an expression representing the área of the new square in terms of b. 4. Shade everything except the new square with length b. 5. Write an expression representing the área on the shaded part. (HINT: use your answers from 1 and 3) ​