Foundation November 2017 Paper 3 Q18
18 The diagram shows a scale drawing of a park, ABCD.
(a) A straight water pipe runs across the park.
The pipe runs equidistant from DA and DC.
The pipe runs equidistant from DA and DC.
Construct, using compasses and ruler only, the position of the water pipe.
You must show all your construction lines. [2]
(b) A straight path connects the entrance to the exit.
This path is perpendicular to CB.
This path is perpendicular to CB.
(i) Construct, using compasses and ruler only, the position of the path.
Leave in all your construction lines. [2]
Leave in all your construction lines. [2]
(ii) Find the actual length of the path, in metres. [2]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| Correct ruled line reaching AB and two pairs of correct arcs | 2 | B1 for correct ruled line reaching AB without all arcs or correct ruled line with arcs but short | Tolerance ±2° |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| (i) Correct ruled line reaching AD through E and two pairs of correct arcs | 2 | B1 for correct ruled line reaching AD without all arcs or correct ruled line with arcs but short or perpendicular ruled line from BC to another side | Tolerance ±2° |
| (ii) 118 to 122 | 2 | Strict FT for all marks. Follow through their straight line in (b)(i) from entrance to another side B1 for their 11.8 to 12.2 [cm] | Use ruler and measure to 2 mm accuracy |