Higher November 2019 Unit 2 Q12
12. The diagram shows a sector of a circle with centre \(O\) and radius 7 cm.
Calculate the perimeter of the sector \(OAB\). [3]
Diagram not drawn to scale
| Scheme | Marks | Comments |
|---|---|---|
| \(\dfrac{42}{360} \times 2 \times \pi \times 7\) | M1 | |
| = 5·1(…) OR \(\dfrac{49}{30}\pi\) | A1 | Or equivalent. Allow 5 from correct working. |
| (Perimeter =) 19·1(…cm) OR \(14 + \dfrac{49}{30}\pi\)(cm) | A1 | Mark final answer. FT ‘their 5·1(…cm)’. Allow 19 (cm) from correct working. |