Finding the Circumference of a Circle

This video tutorial teaches how to find the circumference of a circle by exploring the ratio of the diameter to the circumference. It explains the concept of constant proportionality, introduces pi as a constant ratio, and provides methods to calculate circumference using both diameter and radius. The tutorial also addresses common mistakes and includes an example problem to reinforce learning.

How do you find the circumference of a circle if you know the diameter?

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What mistake might a student make when calculating the circumference using the radius?

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