Foundation November 2020 Paper 3 Q19
19
(a) Work out the size of the exterior angle of a regular 12-sided polygon. [2]
(b) Use your answer to part (a) to write down the size of the interior angle of a regular 12-sided polygon. [1]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 30 final answer | 2 | B1 for 150 or 30 seen or M1 for \(360 \div 12\) oe | e.g. \(180 - \dfrac{180 \times 10}{12}\) |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 150 or FT(180 – (a)) | 1 | Only allow FT if 0 < their (a) < 180 | |