If the circumference of a circle is 18 ( pie symbol), what is the area of the circle?
Thanks
C = pi * d
A = pi * r^2
A = 3.14 * 9^2
A = 254.34 square units
To find the area of a circle, we need to use the formula A = πr^2, where A represents the area and r represents the radius of the circle.
Given that the circumference of the circle is 18π, we can use the formula C = 2πr to find the radius.
So, 18π = 2πr
Dividing both sides of the equation by 2π, we get:
r = 9
Now that we have the radius of the circle, we can substitute it into the area formula:
A = π(9)^2
A = 81π
Therefore, the area of the circle is 81π.