Have each group use string in this way to compare the diameter and circumference of several circles around the room. Give its symbol, p . How can you use an equation to describe the relationship between the circumference and diameter of a circle. Encourage the use of multiple representations, such as paragraphs, charts, drawings, equations, etc. Give students the measurement of a circle's diameter and have them predict the circumference, or give them the measurement of a circle's circumference and have them predict the diameter.
Students can graph the data from their table.