Edexcel IGCSE Math B 6.M loci
Practise loci questions by drawing arcs, parallel loci or angle bisectors, then shading the region meeting all given conditions.
- Syllabus
- First assessment 2018
- Course
- Math B 4MB1
Exam points
- Construct loci a fixed distance from a point, line or side of a shape.
- Use perpendicular or angle bisectors for equidistance conditions in diagrams.
- Shade the region that satisfies several distance conditions in a context.
6.M Loci question 1
[Maximum number: 2]
The scale drawing opposite shows the positions, A, B and C, of three lighthouses. The points A, B and C lie at sea level in the same horizontal plane with B due north of A.
The scale of the drawing is 1 cm represents 50 km.
A ship S is equidistant from A and C and 225 km from B.
Showing all your construction lines, find and mark each of the two possible positions of S on the scale drawing with a cross (×).
Constructs perpendicular bisector of line AC
Draws circle (or two arcs crossing their perpendicular bisector) with radius 4.5 cm from centre B2
B1
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