A circle is a flat figure in which every point is the same distance from the center. A circle has no angles or sides, but we can still measure the surface area within it. When we find the area of a circle, we are attempting to find the number of square units we will need to cover the surface of the circle exactly. Although we cannot fit square units neatly within a circular area, we can use the formula Area = pi x radius2 (A=πr2) to approximate the area.
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