The equation of the circle with its center at the point (a, b) and radius r is: (see the image) Determine the equation of the circle if it passes through the points (8.7, 3.2), (7.5,7.1), and (3.5,6.15).  use a sistem of equations and solve by  Gauss ‒ Jordan method

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A: A point lies on the unit circle if the sum of squares of x-axis and y-axis is 1 Mathematically,

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Q: Which point is not on the Unit Circle? (√5/3, 2/3) (3/4, √7/4) O(2/7,-3/7) (3/5, -4/5)

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