What is the area of the circumference of a basketball hoop’s rim that is 18 inches in diameter?

I multiplied 3.14 x 18 and got 56.52 but it not the right answer. can someone help me?

Question

What is the area of the circumference of a basketball hoop’s rim that is 18 inches in diameter?

I multiplied 3.14 x 18 and got 56.52 but it not the right answer. can someone help me?

dangerousjesse · Answer

You multiply the $radius$ by pi to get the circumference :)

dangerousjesse · Answer

|dw:1409446398928:dw| radius

dangerousjesse · Answer

|dw:1409446452305:dw| diameter

dangerousjesse · Answer

So $\large 18\times 0.5=~~radius$

anonymous · Answer

okay so I got 28.26

dangerousjesse · Answer

C≈56.55

dangerousjesse · Answer

And the equation for the area is simply $A=πr2$

dangerousjesse · Answer

$A=\pi r2$

anonymous · Answer

The answers I can choose from on my homework is 32.14 inches
	28.26 inches
	28.12 inches
	15.69 inches
Since diameter is double the size of radius I divided 18 by2 and got 9 and then I multiplied 3.14 times 9 and got 28.26

dangerousjesse · Answer

That's only the circumference though... You asked for the area

anonymous · Answer

That just what my homework asked but thank you for your help :)