Question

Henry knows that the circumference of a circle is 18mc006-1.jpg inches. What is the area of the circle?

Answer 1

81 pi ^2

Explanation:

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Answer 2

The complete question is:
Henry knows that the circumference of a circle is 18π inches. What is the area of the circle?

Solution:
Circumference (C) of the circle can be written as:


`C=2 \pi r \\ \\ 18 \pi =2 \pi r \\ \\ r=9`

Using this value of radius, we can find the Area(A) of the circle.


`A= \pi r^(2) \\ \\ A= \pi (9)^(2) \\ \\ A=81 \pi`

Therefore, area of the circle having a circumference of 18π inches will be 81π inches²