What is the Circumference of a Circle?

# What is the Circumference of a Circle? Video Lecture | Mathematics (Maths) Class 7

## Mathematics (Maths) Class 7

76 videos|345 docs|39 tests

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## FAQs on What is the Circumference of a Circle? Video Lecture - Mathematics (Maths) Class 7

 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 represents the circumference and r represents the radius of the circle.
 2. How do you find the circumference of a circle if only the diameter is given?
Ans. If only the diameter of a circle is given, you can find the circumference by using the formula C = πd, where C represents the circumference and d represents the diameter of the circle.
 3. What is the relationship between the circumference and the diameter of a circle?
Ans. The relationship between the circumference and the diameter of a circle is that the circumference is always exactly π (pi) times the diameter. In other words, C = πd.
 4. Can we use the circumference to find the area of a circle?
Ans. Yes, we can use the circumference to find the area of a circle. The formula to calculate the area of a circle is A = πr^2, where A represents the area and r represents the radius of the circle. The circumference can be used to find the radius, which can then be substituted into the area formula.
 5. Is the circumference the same as the perimeter of a circle?
Ans. Yes, the circumference of a circle is the same as the perimeter of the circle. The term "circumference" is typically used for circles, while "perimeter" is used for polygons. However, in the case of a circle, the term "circumference" and "perimeter" can be used interchangeably.

## Mathematics (Maths) Class 7

76 videos|345 docs|39 tests

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