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並前往https://www.vedantu.com/question-answer/use-pi-for-finding-the-area-of-a-circle-class-10-maths-cbse-5f059f9a2ff7865762a98b12

Why do we use π for finding the area of a circle? - Vedantu

So finding circumference from equation (1) and using the information that radius is half of diameter we get, \[circumference=\pi \times 2\ ...

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