Suppose the center of a circle is at (1, -1) and a point on the circle is at (2, 0).
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The distance formula is given by: \[ r = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} \] where (x1, y1) is the center of the circle and (x2, y2) is the point on the circle. Show more…
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