June 2018 Paper 2 Q7
7 \(PQRS\) is a trapezium.
The area of the trapezium is 63 square units.
Work out the value of \(a\). [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(\dfrac{1}{2} \times (8 + 4) \times a\ (= 63)\) or \(\dfrac{1}{2} \times 12 \times a\ (= 63)\) or \(6a\ (= 63)\) or \(63 \div 6\) | M1 | any letter oe eg \(12a = 126\) or \(\dfrac{1}{2} \times 3 \times a + 4 \times a + \dfrac{1}{2} \times 1 \times a\ (= 63)\) |
| 10.5 or \(10\dfrac{1}{2}\) or \(\dfrac{21}{2}\) | A1 |
Additional guidance
| M1 is for a full area calculation (= 63) |