7.069 square inches.
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The area of a 3-inch diameter circle is about 7.068 square inches.
No. Area of 3 inch circle is 9/4 pi so two of them total 9/2 ie 4.5 pi. Area of 6 inch circle is 9 pi, the equivalent of 4 of the smaller circles!
Radius is 3 times as large so area is 3*3 = 9 times as large.
The area of a 7-inch circle is: 38.48 square inches.
The area of a 26-inch diameter circle is 530.93 square inches.