- #1
Albert1
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Albert said:
The formula for calculating the area of a circle is A = πr², where A is the area and r is the radius of the circle.
If you only know the diameter of the circle, you can first divide it by 2 to find the radius. Then, use the formula A = πr² to calculate the area.
No, the value of pi is a constant and cannot be changed. The most commonly used value for pi is 3.14, but for more precise calculations, you can use more digits such as 3.14159265359.
To find the area of a circle with a given circumference, you can use the formula A = (C² / 4π), where A is the area and C is the circumference. In this case, A = (10² / 4π) = 7.9577 units squared.
The area of a circle is typically measured in square units, such as square centimeters (cm²) or square inches (in²). The unit used will depend on the unit of measurement for the radius or diameter of the circle.
