What is the exact area of a circle whose diameter is 24 cm?

A.

576 pi cm2

B.

144 pi cm2

C.

48 pi cm2

D.

24 pi cm2

The area of a circle is A = pi times r squared, where r is the radius and A is the area, and the diameter is given as 24. The radius is equal to one half of the diameter, therefore the radius is 12. Now substitute the equation for area of a circle with these values: A = pi times 12 squared A = pi times 144

The answer is C thx you