Show that the points A(1, 0), B(2, -7), ...

Show that the points `A(1, 0), B(2, -7), C(8, 1)` and `D(9,-6)` all lie on the same circle. Find the equation of this circle, its centre and radius.

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The correct Answer is:

Hence, the point (9,-6) lies on the that is, the four points are concyclic.

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