Mathematics 9709 · AS & A Level · Coordinate geometry

Coordinate geometry — practice question

The points $A(7, 1)$, $B(7, 9)$ and $C(1, 9)$ lie on a circle’s circumference.
(a)[5]

Find the equation of the circle.

(b)[2]

Find the equation of the tangent to the circle at $B$.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Identify the centre $(4,5)$” …

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