Intermediate June 2018 Unit 1 Q8
8. In this question, you will be assessed on the quality of your organisation, communication and accuracy in writing.
In the diagram below, ABCE is a square whose perimeter is 28 cm.
CDE is a right-angled triangle whose area is 35 cm2.
Diagram not drawn to scale
Calculate the length of DE.
You must show all your working. [4 + 2 OCW]
| Scheme | Marks | Comments |
|---|---|---|
| (EC = Side of the square =) \(\dfrac{28}{4}\) | M1 | Lengths may be seen on the diagram. |
| = 7(cm) | A1 | Any side of square shown as 7(cm) is M1A1. |
| (Area of triangle CDE =) \(\dfrac{7 \times \text{DE}}{2}\) = 35(cm2) | M1 | FT ‘their stated or shown length for EC’. |
| (DE =) 10(cm) | A1 | |
| Organisation and Communication. | OC1 | For OC1, candidates will be expected to:
|
| Accuracy of writing. | W1 | For W1, candidates will be expected to:
|