- Area of Circle, Perimeter of CircleChoice D
Given that the circumference of the circle is

$$ 2\pi r=12\pi $$

$$ r=\frac{12\pi}{2\pi} $$

$$ r=6 $$

Therefore to find the area:

$$ area=\pi\times(6)^2 $$

$$ =36\pi $$

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