In this lesson, you'll learn how to calculate the circumference and area of a circle using easy-to-remember formulas. The circumference of a circle is found by doubling the radius and multiplying by pi, while the area is found by squaring the radius and multiplying by pi. You'll also learn how to estimate the values of the circumference and area by using an approximation for pi. By the end of the lesson, you'll have a solid understanding of how to calculate these measurements for circles of any size.
Easy formulas and examples for circumference and area of a circle: C = 2r * pi and A = r^2 * pi;
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