Answer:
Area is around 254.47
Explanation:
Using diameter you use the formula:
insert 18 in place of the d
Insert 1/4*
Multiply by 18^2 or Multiply it by 18 twice
around 254.47
pi*r^2 is the equation. the radius is 9 so in the equation the r^2 is equal to 81 since 9*9 =81. 81*pi is equal to 254.47
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