4MA0 Foundation January 2015 Paper 1 Q17
17 Find the sum of the interior angles of a polygon with 7 sides.
(2)
| Scheme | Marks |
|---|---|
(2 × 7 – 4) × 90 or (7 – 2) × 180 or \(7\left(180 - \dfrac{360}{7}\right)\) or 720 + 180 | M1 |
| 900 | A1 |
| (2) | |
| (2 marks) |
Notes
M1: For the sum of the interior angles or an interior angle
Eg Allow M1 for \(\dfrac{(7 - 2) \times 180}{7}\) oe or 128.(571428.....) correctly rounded or truncated to at least 3SF.
A1: Mark the final answer