The line from the centre of the circle to any point on its circumference
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Yes.
The formula is pi (3.14) x radius x radius 3.14 x 12 x 12 = 446.4
The area of a cirle is: PI * r2 Where "r" is the radius, and PI is approximately 3.14. Hint: A radius is half of the diameter.
The radius of a circle is always PRECISELY one half its diameter.
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