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What is Circle? Video Lecture | Mathematics for Class 4: NCERT

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FAQs on What is Circle? Video Lecture - Mathematics for Class 4: NCERT

1. What is a circle?
Ans. A circle is a closed, two-dimensional shape that is perfectly round and consists of all points in a plane that are equidistant from a fixed point called the center.
2. What are the properties of a circle?
Ans. The properties of a circle include having a constant radius (the distance from the center to any point on the circle), having a diameter (twice the length of the radius), and having a circumference (the distance around the circle).
3. How can the area of a circle be calculated?
Ans. The area of a circle can be calculated using the formula A = πr^2, where A represents the area and r represents the radius of the circle. The constant π (pi) is approximately 3.14159.
4. What is the relationship between the circumference and diameter of a circle?
Ans. The circumference of a circle is directly proportional to its diameter. In other words, the circumference is equal to π times the diameter (C = πd).
5. How can the circumference of a circle be calculated?
Ans. The circumference of a circle can be calculated using the formula C = 2πr, where C represents the circumference and r represents the radius of the circle. The constant π (pi) is approximately 3.14159.
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