| Exam Board | Pre-U |
|---|---|
| Module | Pre-U 9794/1 (Pre-U Mathematics Paper 1) |
| Year | 2012 |
| Session | Specimen |
| Marks | 2 |
| Topic | Circles |
| Type | Find centre and radius from equation |
| Difficulty | Easy -1.8 This is a direct recall question requiring only recognition of the standard form (x-a)²+(y-b)²=r². No algebraic manipulation, problem-solving, or multi-step reasoning is needed—students simply read off the centre (-5, 3) and radius 6. |
| Spec | 1.03d Circles: equation (x-a)^2+(y-b)^2=r^2 |
Centre $(-5, 3)$ **B1**
Radius $6$ **B1**
**Total: 2 marks**1 Write down the coordinates of the centre and the radius of the circle with equation
$$( x + 5 ) ^ { 2 } + ( y - 3 ) ^ { 2 } = 36 .$$
\hfill \mbox{\textit{Pre-U Pre-U 9794/1 2012 Q1 [2]}}