4MA0 Foundation June 2011 Paper 1 Q15
15
Diagram NOT accurately drawn
Four of the angles of a pentagon are 97°, 114°, 127° and 84°.
Work out the size of the fifth angle.
(4)
| Scheme | Marks |
|---|---|
| ((5 − 2) × 180 or 3 × 180 or (2 × 5 − 4) × 90 or 6 × 90 or 360 + 180 | M1 |
| 540 | A1 |
| “540” − (97 + 114 + 127 + 84) | M1 |
| 118 | A1 |
| (4) | |
| (Total 4 marks) |
Notes
A1: 540 seen scores M1 A1
M1: dep on first M1
A1: cao
Alternative method
| Scheme | Marks |
|---|---|
| 360 − (83 + 66 + 53 + 96) | M1 |
| 62 | A1 |
| 180 − “62” | M1 |
| 118 | A1 |
Notes
M1: Condone 1 incorrect ext angle