Find the Circumference circle (9ft)

Math
r=9ft
The circumference of a circle is equal to Pi π times the diameter d.
π⋅(diameter)
Since the diameter d is equal to 2 times the radius r, the formula for circumference using radius is 2πr.
2π⋅(radius)
Substitute the value of the radius r=9 into the formula for the area of a circle. Pi π is approximately equal to 3.14.
2⋅π⋅9
Multiply 9 by 2.
18π ft
Find the Circumference circle (9ft)

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