O-LevelMathematicsGeometry4024/12 · Oct/Nov 2018 · Q134 Marks
The scale diagram shows two islands at A and B. [Figure showing North, A, B]
- (a)Write the scale 2 cm to 1 km in the form 1 : n.[1]
- (b)By measurement, find the bearing of B from A.[1]
- (c)An island at C is on the northern side of AB. It is 3 km from A and 2.5 km from B. Use a ruler and a pair of compasses to construct triangle ABC.[2]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2018). The mark or mark type is shown in brackets.
- [1] 50 000
- [1] 286° to 289°
- [2] Acceptable triangle ABC with intersecting arcs at a labelled point C
- B1 for an acceptable triangle with the correct point C clearly labelled, but with no/incorrect arcs;
- or B1 for an acceptable drawn triangle with intersecting arcs but no label C;
- or B1 for an acceptable point C clearly labelled, with intersecting arcs, but with AC and/or BC not drawn.
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