Answer: 63.61725124
Step-by-step explanation:
area = pi x r^2
diameter is double the radius, labeled r in the formula.
9/2 = 4.5
r = 4.5
area = pi x 4.5^2
area = 63.61725124 or 81/4pi
63.585 inches^2
Step-by-step explanation:
The formula for the area of a circle is...
[tex]A=\pi r^2[/tex]
We need the radius for this, but we have the diameter. Since radius is half of the diameter, we know the radius will be 4.5. We can plug that in.
[tex]A=3.14*4.5*4.5[/tex]
[tex]A=[/tex]
63.585 inches^2
