1MA0 Higher June 2015 Paper 1 Q17
17
Diagram NOT accurately drawn
\(ABCDE\) is a regular pentagon.
\(ACFG\) is a square.
Work out the size of angle \(DCF\).
You must show all your working. (4)
| Answer | Mark | Notes |
|---|---|---|
| 18 | 4 | M1 for a method to find the exterior angle of a pentagon eg. \(360 \div 5\) (=72) or the interior angle of a pentagon, eg. \(180 - 360 \div 5\) (= 108) A1 for 72 or 108 M1 (dep M1) for a fully complete method to find the required angle, \(DCF\) A1 for 18 or ft their interior or exterior angle |