The area is 28.274 square meters.
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The area of a circle with a diameter of 6.5 is: 33.18 square units.
The formula for calculating the area of a circle is:r²πSo, the area of a circle with a diameter of 6 inches (with a radius of 3 inches) is:3²π = 9π ≈ 28.2743 in²
If a circle has a circumference of 6 inches the diameter is: 1.91 inches (circumference divided by Pi = diameter).
Since circumference equals pi times the diameter, if the diameter of a circle is 6, then its circumference is going to be pi times 6 or 6 pi.
They would have to give you enough information to eventually get the diameter. If they gave you the area of a circle and asked for the circumference, you can determine the radius, and from the radius the diameter, and then the circumference. If they said "What is the circumference if the area of a circle is 36pi?" Area of a circle is pi*r2, which would give us a value for r = 6 Diameter is 2*r, or = 12. Circumference is d*pi, or 12pi