# Find the Area circle (9)

r=9
The area of a circle is equal to Pi π times the radius r squared.
Substitute in the value of the radius r=9 into the formula for the area of a circle. Pi π is approximately equal to 3.14.
π⋅92
Raise 9 to the power of 2.
π⋅81
Move 81 to the left of π.
81π
The result can be shown in multiple forms.
Exact Form:
81π
Decimal Form:
254.46900494…
Find the Area circle (9)

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