Area = 22/7*72 = 154 square inches
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Using 3.14 as Pi the area of circle is: 12.56
The circumference C of any circle is equal to pi*diameter. The diameter is equal to the radius times 2. So, for a circle with radius 48, it has a diameter of 96, and a circumference of 96*3.14=301.44. This of course is using 3.14 as an estimate for pi.
Area = (3.14) x (radius) x (radius) "Radius" means the distance from the center of the circle out to the circle's curved line.
A circle with a radius of 16 cm has an area of 804.25 square cm.
x2+y2-4x-6y-3 = 0 Using the appropriate formula it works out as:- Centre of circle: (2, 3) Radius of circle: 4.