Area of a circle
A=pi*(r^2)
The formula for the area of a circle is:
A = πr²
Where A is the area and r is the radius of the circle. π (pi) is a mathematical constant that has a value of approximately 3.14159.
To use this formula, you need to know the radius of the circle. The radius is the distance from the center of the circle to any point on its edge.
To find the area of a circle, follow these steps:
1. Measure the radius of the circle
2. Square the radius by multiplying it by itself
3. Multiply the squared radius by π
4. Round the answer to the desired number of decimal places
For example, if the radius of a circle is 5 cm, the area would be:
A = πr²
A = π(5)²
A = π(25)
A = 78.54 cm² (rounded to two decimal places)
Therefore, the area of a circle with a radius of 5 cm is approximately 78.54 cm².
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