This lesson is perfect for use on Pi Day (March 14) or any other time your class is studying circles. The PowerPoint presentation guides students through how to find the circumference of a circle while also learning the following skills:
• Using a compass to draw circles
• Finding the radius and diameter of a circle
• Estimating the circumference of a circle
• Estimating the value of pi
• Learning about the relationship between circumference, diameter, and pi
• Using the pi button on TI calculators
Through the hands-on activities, students learn that pi is a symbol that represents the constant relationship between diameter and circumference. They then practice finding the circumference of an actual pie using the formula they have learned in the lesson. The document “Pi Day Recording Sheet" provides a space for students to do their work.
The presentation is offered in both PowerPoint and PDF formats so that the end user can edit the lesson if desired. The Recording sheet is offered in both Word and PDF formats. All four documents are part of the .zip file in this download.
You will need the following materials for this lesson:
• recording sheets printout (one for each student)
• compasses (one for each student or small group)
• rulers (one for each student or small group)
• TI calculators (optional, one for each student or small group)
• pies (one for each small group)
This presentation is most appropriate for use during whole-class instruction. However, students who follow written directions well may be able to complete the hands on activity in pairs by following a printed handout or by viewing the PowerPoint presentation on a computer screen.
Before starting the lesson, students should be familiar with the concepts of area and perimeter and know how to find the perimeter of a square. As well, students should be familiar with the meanings of radius and diameter. Accurate measurement skills are also important for the success of this lesson.