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What is the Circumference of a Circle? Video Lecture | Mathematics for Grade 7
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FAQs on What is the Circumference of a Circle? Video Lecture - Mathematics for Grade 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.
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