4400 Higher June 2005 Paper 3 Q13
13 The size of each exterior angle of a regular polygon is \(18^\circ\).
(a) Work out how many sides the polygon has. (2)
(b) Work out the sum of the interior angles of the polygon. (2)
| Scheme | Marks |
|---|---|
| \(\dfrac{360}{18}\) | M1 |
| 20 | A1 |
| (2) |
Notes
A1: cao
| Scheme | Marks |
|---|---|
| “20” × (180 − 18) or (“20” − 2) × 180 | M1 |
| 3240 | A1 |
| (2) | |
| (4 marks) |
Notes
A1: ft from (a)