Circumference of Circles

Grade 7 Math | Lesson ID: 07M0517002

30 minutesIntermediate
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Introduction to Circumference

The circumference is the distance around a circle - the perimeter of a circular shape. Finding circumference is essential for many real-world applications from wheel design to track racing.

The constant π (pi), approximately 3.14159, represents the ratio of a circle's circumference to its diameter. This relationship is the same for all circles, making it a fundamental constant.

In this lesson, you'll learn to calculate the circumference of circles using the formulas C = πd and C = 2πr.