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How many square inches in a 4.5 inch diameter circle?

Updated: 11/3/2022

Wiki User

∙ 12y ago

Best Answer

The formula for the area of a circle is A = is Ï€r2, where Ï€ is 3.14159 rounded to five decimal places, and radius is 1/2 the diameter.

Radius = 4.5in/2 = 2.25in

A = Ï€r2 = 3.14159 x (2.25in)2 = 3.14159 x 5.0625in2 = 15.9042in2

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∙ 12y ago

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