is the area of a circle calculated?
The area of a circle is calculated using the formula A = πr2, where A is the area, π is the constant pi (approximately 3.14), and r is the radius of the circle. This formula is derived from the fact that the area of a circle is equal to the circumference of the circle multiplied by its radius. The circumference of a circle is calculated using the formula C = 2πr, where C is the circumference and r is the radius. Therefore, the area of a circle is equal to C x r, or 2πr2, which simplifies to A = πr2.
How and why
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