To calculate the area of a circle, you use the following formula:

$A = \pi r^2$

Where:

• $A$ is the area of the circle.
• $r$ is the radius of the circle.
• $\pi$ (Pi) is approximately 3.14159.

Steps to Calculate:

1. Measure the radius of the circle. This is the distance from the center to any point on the edge of the circle.
2. Square the radius (multiply it by itself).
3. Multiply the squared radius by $\pi$ to get the area.

Example:

If the radius of the circle is 5 units, the area would be:

$A = \pi (5)^2 = \pi \times 25 \approx 78.54 \text{ square units}.$

Let me know if you'd like more details or have any questions!

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Here are 5 related questions you might find interesting:

1. How do you calculate the circumference of a circle?
2. What is the difference between the radius and the diameter of a circle?
3. How does the area of a circle relate to its circumference?
4. Can you calculate the area if you only know the diameter of the circle?
5. How do you calculate the area of a sector of a circle?

Tip: Always use the same units for the radius when calculating the area (e.g., if the radius is in centimeters, the area will be in square centimeters).