The area of the circle is 225 cm². Find the circumference corresponding to this circle.
| February 7, 2021 | education
The formula for the area of a circle is S = nR ^ 2. Knowing the area of the circle, we find the radius:
225 = 3.14 * R ^ 2;
R ^ 2 = 71.656;
R = 8.465 (cm).
Find the circumference:
C = 2nR = 2 * 3.14 * 8.465 = 53.16 (cm).
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