Area formula for a circle
The formula for finding the area of a circle is:
A = πr²
Where:
A represents the area,
π (pi) is a mathematical constant approximately equal to 3
The formula for finding the area of a circle is:
A = πr²
Where:
A represents the area,
π (pi) is a mathematical constant approximately equal to 3.14159,
and r is the radius of the circle.
To use the formula, follow these steps:
1. Measure the radius of the circle. The radius is the distance from the center of the circle to any point on the circumference.
2. Square the value of the radius. Multiply the radius by itself (r * r).
3. Multiply the squared radius by π (pi). Multiply the result from step 2 by π to find the area of the circle.
For example, let’s say you have a circle with a radius of 5 cm. Using the formula, we can calculate its area:
A = π * (5)²
A = 3.14159 * 25
A ≈ 78.54 cm²
So, the area of the circle with a radius of 5 cm is approximately 78.54 square centimeters.
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