4MA0 Foundation January 2012 Paper 2 Q12
12
Diagram NOT accurately drawn
The diagram shows a quadrilateral \(ABCD\).
\(AB = BD = AD\).
\(CB = CD\).
Angle \(BCD = 78^\circ\)
Work out the size of angle \(ABC\).
(4)
| Scheme | Marks |
|---|---|
| (\(\angle ABD =\)) 60° | B1 |
| (\(\angle DBC =\)) \(\dfrac{180^\circ - 78^\circ}{2}\) | M1 |
| 51° | A1 |
| 111 | A1 |
| (4) | |
| (Total 4 marks) |
Notes
B1: May be stated or marked on diagram
A1: May be stated or marked on diagram