The Area of a Circle

Eighth graders find the circumference and diameter of several lids, show the relationship of the two measurements and derive the formula for finding the area of a circle. In this area of a circle lesson plan, 8th graders find circumference, diameter and area of circles. They discuss pi as the relationship between the circumference and diameter of a circle and they show the geometric relationship of the area of a circle and the shape of a parallelogram.

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