Foundation November 2018 Paper 1 Q15
15 Trapezium \(ABCE\) is made from parallelogram \(ABCD\) and isosceles triangle \(ADE\).
\(AE = DE\)
Not drawn accurately
Work out the size of angle \(AED\). [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(ADC = 110\) or \(BAD = 180 - 110\) or \(BAD = 70\) or \(BCD = 180 - 110\) or \(BCD = 70\) or any indication that angle \(EAD\) = angle \(EDA\) or any indication that angle \(BCD\) = angle \(ADE\) | M1 | may be seen on diagram eg both written as \(x\) or both having the same value |
| \(EDA = 180 - 110\) or \(EDA = 70\) or \(EAD = 180 - 110\) or \(EAD = 70\) | M1dep | may be seen on diagram |
| 40 | A1 |
Additional guidance
| Angle values must be identified with the correct angle, either by notation or use of the diagram Notation such as \(D = 110\) or \(C = 70\) is not acceptable (although marks may still be awarded for correct position of angles on diagram) | |
| Work on the diagram can score up to M2 | |
| Subject to the previous comment, award the higher mark for work seen on diagram and work seen in working space | |
| Ignore incorrect angles when awarding up to M2, but any incorrect work cannot score M2A1 | |
| 40 marked as angle \(AED\) on diagram but :- 180 on answer line or no sign of 40 as final answer in working | M2A0 |