Higher June 2019 Paper 6 Q7
7 Construct the perpendicular from the point P to the line AB.
Show all of your construction lines.
[2]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| Ruled perpendicular constructed with correct arcs (one pair intersecting AB) | 2 | Condone dashed line B1 for correct arcs (one pair intersecting AB) only but no line or correct ruled line but no, or incomplete construction arcs  | Set protractor to 90° and check 88° to 92° at AB Correct construction arcs as shown (may be two pairs of arcs used to draw line through P) Ignore other arcs if correct arcs clearly used to construct line Condone perpendicular extending beyond AB but must pass through P and reach AB (no daylight) Alternative arcs. One centred on A length AP and one centred on B length BP meeting below AB (may also pass through P). Use overlay as check Candidates may use points on AB other than A and B for this construction. In such cases check radii of arcs using on-line ruler to judge. |