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The formula for the area of a circle is A = is πr2, where π is 3.14159 rounded to five decimal places, and radius is 1/2 the diameter.
Radius = 4.5in/2 = 2.25in
A = πr2 = 3.14159 x (2.25in)2 = 3.14159 x 5.0625in2 = 15.9042in2
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