| Exam Board | OCR |
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| Module | C1 (Core Mathematics 1) |
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| Year | 2008 |
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| Session | January |
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| Topic | Circles |
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2
- Write down the equation of the circle with centre \(( 0,0 )\) and radius 7 .
- A circle with centre \(( 3,5 )\) has equation \(x ^ { 2 } + y ^ { 2 } - 6 x - 10 y - 30 = 0\). Find the radius of the circle.