Foundation June 2018 Paper 2 Q21
21
(a) A circle has radius 4.2 cm
Work out the length of the circumference.
Give your answer to 1 decimal place. [3 marks]
(b) The circle below has centre O.
Draw a sector on the circle. [1 mark]
| Answer | Mark | Comments |
|---|---|---|
| \(2 \times 4.2 \times \pi\) or \(8.4\pi\) | M1 | oe allow [3.14, 3.142] for \(\pi\) |
| [26.376, 26.393] | A1 | may be implied by 26.4 as answer |
| 26.4 | B1ft | ft their value to at least 2 dp rounded correctly to 1 dp |
Additional guidance
| 26.4 | M1A1B1ft |
| 26.3 only | M0A0B0ft |
| 55.4 only | M0A0B0ft |
| Answer | Mark | Comments |
|---|---|---|
| Sector drawn correctly | B1 | two radii joined at the centre of the circle |
Additional guidance
| Mark intention | |
| Diameter drawn | B1 |
| Any number of sectors (eg diameter and radius drawn) | B1 |
| Ends of radii joined to form segment with whole sector shaded | B1 |
| Ends of radii joined to form segment without whole sector shaded | B0 |