What is the Area of a Circle?
The area of a circle is equal to π (Pi) times its radius squared (r2), where r is the radius of the circle.
How to Calculate the Circumference of a Circle
The circumference of a circle formula is: C = 2 * π * r, where C is the circumference, π represents the ratio of a circle's circumference to its diameter, and r is the radius of the circle.
This circumference formula has been accurately calculated since at least 1659 when it was proposed by English mathematician Isaac Barrow.
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