R = 2 D iam e t er
then
R = 2 22 in
R = 11 in
now we just need to apply this formula
S = π ∗ R 2
S = π ∗ 1 1 2
S = 121 ∗ π i n 2
d = 2 r d = 22 2 r = 22 r = 11 in c h es A = π r 2 A = π ⋅ 1 1 2 = 3 , 14 ⋅ 121 = 379 , 94 in c h 2
The area of a circle with a diameter of 22 inches is calculated by first finding the radius, which is 11 inches. Using the formula for the area A = π R 2 , the area is found to be 121 π in 2 or approximately 379.94 in 2 .
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