It means to multiply the radius by itself: radius x radius
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When you try to figure out an area of a circle, you square the radius, then multiply it by pi to get the area of a circle. A radius square is radius x radius, or radius squared.
divide the square feet by pi that gives you the radius squared find the square root and get the radius
If you mean area of a circle with a radius of 25 cm then it is:- Area = pi*252 = 1963.495 square cm to 3 decimal places
A circle with a radius of 10 meters has an area of 314 square meters.
Pie radius square