PiNow that students have discovered pi as the relationship between the circumference and diameter of a circle, it is time for them to use it to find the area of a circle. Posting these formulas up around the room can be helpful to students. Materials: one copy of a large circle divided into 8 congruent parts; scissors and rulers for each student Preparation: Draw a large circle on a piece of paper. Divide it into 8 equal parts as shown below. Make enough copies for the whole class.





WrapUp and Assessment Hints Provide students with a lot of practice working with the formulas for circumference and diameter before moving on to area. Have students explain to you what substitutions they make in equations and why. By verbalizing their reasoning, both you and your students will be able to assess their understanding of the topics and progress at a reasonable rate. 
