What is the formula used to calculate the area of a circle when the radius is provided?
To calculate the area of a circle when the radius is provided, you can use the formula:
Area = π * (radius)^2
Here's a step-by-step explanation of how to use this formula:
1. Start with the given radius of the circle. It is the distance from the center of the circle to any point on its circumference.
2. Multiply the radius by itself (radius^2). For example, if the radius is 5 units, then you would calculate 5^2, which equals 25.
3. Once you have the squared value of the radius, multiply it by the mathematical constant π (pi). Pi is approximately equal to 3.14159, but you can use a more precise value if needed.
4. In the formula, replace "radius" with the value you obtained in step 2 and calculate π * (radius^2). Using the previous example, the calculation would be 3.14159 * 25, which equals 78.53975.
5. Round your answer to the desired level of precision. In this case, the area of the circle would be approximately 78.54 square units.
Remember to include the units of measurement when expressing the area.