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GCSE Mathematics · key term
A line or curve separating the points that satisfy an inequality from those that do not.
Used by OCR
Specification 8.02d, 10.02a · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
Revise: Loci ConstructionThe complete boundary resembles a running track.
The line or edges forming the outside of a shape.
Translate every condition separately before shading: draw each boundary, decide which side or region satisfies it, then take the overlap.
Check whether the wording asks for points exactly a distance away, within a distance, or farther than a distance. These produce a boundary, an inside region, or an outside region respectively.
Trace the complete outside boundary once, marking each side as you include it so that none is missed or counted twice.
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