To calculate the area of a circle, you can use the formula:
\[ \text{Area} = \pi r^2 \]
where \( r \) is the radius of the circle and \( \pi \) is approximately 3.14.
If you have the radius, you can substitute it into the formula. For example, if the radius \( r \) is 5 units, the calculation would be:
\[ \text{Area} = 3.14 \times (5^2) = 3.14 \times 25 = 78.5 \]
So the area of a circle with a radius of 5 units would be 78.5 square units. You can use this method with any radius by substituting the value of \( r \) into the formula.
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