Area of a circle = pi*radius2
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The formula for area of a circle is: A = pi * r2 (area equals pi times radius squared) There fore if you plug in the numbers you know (pi = 3.14) you get 125 = 3.14 * r2 39.8 = r2 r = 6.31 inches
The area of the circle is 1,256.6 square inches.
If the area of a circle is about 28 square inches the diameter of the circle is: about 6 inches (5.971).
The area of a circle with a diameter of 16 inches is: 201.1 square inches.
A circle with a radius of 11 inches has an area of 380.13 square inches.