## Exam Style Question## Worked solutions to typical exam type questions that you can reveal gradually |

Question id: 253. This question is similar to one that appeared in a GCSE Higher paper (practice) for 2017. The use of a calculator is allowed.

(a) The circumference of a circle is \(16 \pi \) cm and its centre is at the origin. Find the equation of the circle.

(b) The line \(12x+ ay = b\) is a tangent at the point (6, 5) to a different circle with centre at the origin. Find the values of a and b.

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