The phrase "two inch circle" implies that the circle's area has already been calculated as "two square inches". However, if you truly meant that the circle had a diameter of two inches, it's area would be pi. Alternatively, if you meant a radius of two inches, the area would be 4pi.
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A 1.25-inch diameter circle contains 1.227 square inches.
A 4.75-inch diameter circle contains 17.72 square inches.
Area of circle in square inches = pi*radius squared
Area of a circle = pi*radius2 inches
A 20-inch diameter circle contains: 314.16 square inches.