r=1/2 d
r=6
A=3.1415 x (6x6)
A is approx. 113.1
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The area of a circle that has a 12-inch diameter is: 113.1 square inches.
A circle with a diameter of 12 inches has an area of ~113.1 square inches.
As the diameter of a circle is twice the radius, a circle with a 6-foot radius would have a diameter of 6 x 2 or 12 feet.
Area of a Circle = (pi)(r^2) Diameter = 2r If the diameter of the circle is 12, then the radius has to be 6. If the area of a circle is pi times the square of the radius, and the square of 6 is 36 (6x6), then the area of the circle is 36pi.
6 Feet