To find the radius of a circle given its area, you can use the formula for the area of a circle:
\[ A = \pi r^2 \]
where \( A \) is the area and \( r \) is the radius.
Given that the area \( A \) is 28.26 cm², you can set up the equation:
\[ 28.26 = \pi r^2 \]
To solve for \( r \), first divide both sides by \( \pi \):
\[ r^2 = \frac{28.26}{\pi} \]
Using the approximate value of \( \pi \) as 3.14, you can calculate:
\[ r^2 \approx \frac{28.26}{3.14} \approx 9 \]
Now take the square root of both sides:
\[ r \approx \sqrt{9} = 3 \text{ cm} \]
Therefore, the radius of the circle is approximately 3 cm.