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Show that (4,3) is the centre of the circle which passes through the points(9,3),(7,−1) and (1,−1). Find also its radius.

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Show that (4,3) is the centre of the circle which passes through the points (9,3),(7,−1) and (1,−1). Find also its radius.

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Suppose C represents the pints (4, 3). Let P, Q and R denote the points (9, 3), (7, -1) and (1, -1) respectively. Using the distance formula

Hence, the points P, Q, R are on the circle with centre at (4, 3) and its radius is 5 units.

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