Circumference of Circles Explained with Formulas and Examples

The video tutorial explains the concept of circumference, which is the distance around a circle, and its dependence on the diameter. It introduces the formulas for calculating circumference: pi times diameter and 2 pi times radius. The tutorial provides practical examples and problem-solving techniques, demonstrating how to use these formulas in real-world scenarios. It also covers advanced problems, such as finding the radius when given the circumference, and emphasizes the importance of understanding these concepts for exams.

What is the value of pi and how is it used in calculating circumference?

What does the 'R' in the formula 2πr stand for?

If the diameter of a circle is 12 cm, what is the approximate circumference?