2. Give each student eight square pieces of paper whose side length is twice the length of the original square. Ask students to determine the angle measures, segment measures, and area measures when an octagon is formed with these papers. Students should be able to determine most of the results without actually folding a new shape; for others, they may need to create two or three parallelograms, fit them together, determine the area of one pentagon, and use that to make other calculations.