Specimen 2020 Paper 2 Q9
9 \(A\), \(B\) and \(C\) are points on a circle, centre \(O\).
Not drawn accurately
Work out the size of angle \(y\). [5 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(x + 62 = 2(2x - 50)\) | M1 | oe |
| \(62 + 100 = 4x - x\) or \(3x = 162\) | M1dep | oe correct expansion and collection of terms |
| \(x = 54\) | A1 | |
| \(\dfrac{180 - 62 - \text{their } 54}{2}\) | M1dep | |
| 32 | A1ft | ft their \(x\) with first and third M1 gained |