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Quick Revision: Circles Video Lecture | Mathematics for Class 5

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FAQs on Quick Revision: Circles Video Lecture - Mathematics for Class 5

1. What is the formula to calculate the circumference of a circle?
Ans. The formula to calculate the circumference of a circle is C = 2πr, where C is the circumference and r is the radius of the circle.
2. How is the area of a circle calculated?
Ans. The area of a circle is calculated using the formula A = πr^2, where A is the area and r is the radius of the circle.
3. Can the diameter of a circle be used to calculate its circumference?
Ans. Yes, the diameter of a circle can be used to calculate its circumference by using the formula C = πd, where C is the circumference and d is the diameter of the circle.
4. How is the radius of a circle related to its diameter?
Ans. The radius of a circle is half the length of its diameter. This means that the radius is equal to half of the diameter.
5. How can the circumference of a circle be approximated using the value of π?
Ans. The value of π is commonly approximated as 3.14. To calculate the circumference of a circle using this approximation, simply multiply 3.14 by the diameter of the circle.
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