Foundation January 2020 Paper 2R Q26
26 The diagram shows two congruent isosceles triangles and parts of two congruent regular polygons, X and Y.
Diagram NOT accurately drawn
The two regular polygons each have \(n\) sides.
Work out the value of \(n\).
(3)
| Scheme | Marks |
|---|---|
| 180 − 2 × 66 (= 48) (360 − “48”) ÷ 2 (= 156) 180 − “156” (= 24) | M1 |
| 360 ÷ “24” | M1 |
| 15 | A1 |
| (3) | |
| (3 marks) |
Notes
Alternative
| Scheme | Marks |
|---|---|
| 180 − 2 × 66 (= 48) | M1 |
| 360 ÷ (0.5 × “48”) | M1 |
| Answer: 15 | A1 |