Foundation January 2020 Paper 2 Q15
15 A regular polygon has \(n\) sides.
The size of each interior angle of the regular polygon is 140°
Work out the value of \(n\).
(3)
| Scheme | Marks |
|---|---|
| 180 – 140 (= 40) or \(180(n - 2) = 140n\) oe | M1 |
| 360 ÷ ‘40’ or \(40n = 360\) oe | M1 |
| 9 | A1 |
| (3) | |
| (3 marks) |
Notes
M1: Correct method to find exterior angle or correct substitution into formula