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What is the Circumference of a Circle with a 4cm Diameter?

Learn how to calculate the circumference of a circle with a 4cm diameter using the standard formula.

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Video transcript

To calculate the circumference of a circle with a diameter of 4cm: Use the formula C = πd. Here, C is the circumference and d is the diameter. So, for a 4cm diameter, the circumference is approximately 12.57cm, when π is approximated as 3.14.

Questions and answers

  1. What is the formula for calculating circumference?

    The formula for calculating the circumference of a circle is C = πd, where d is the diameter.

  2. How is π approximated in calculations?

    In many calculations, π is approximated as 3.14 for simplicity.

  3. What is the circumference of a circle with a diameter of 1 meter?

    Using the formula C = πd, the circumference of a circle with a diameter of 1 meter is approximately 3.14 meters.

  4. Why is understanding circumference important?

    Understanding circumference is essential for various applications in mathematics, engineering, and everyday life, including measuring lengths and distances.

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For more insights into geometry, check out our videos on calculating area and volume, or explore the fundamentals of shapes and their properties.