Loci and Constructions — Worked Examples (Edexcel GCSE Maths): Flashcards
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Practise the cards
13 cards from this deck
Definition of locus
Definition of locus
A set of points that satisfy a particular condition
Plural of locus
Plural of locus
Loci
Key strategy for multiple loci conditions
Key strategy for multiple loci conditions
Draw each locus first, then find where all overlap
Quarter circle in loci represents
Quarter circle in loci represents
Points within a fixed distance from a point
Perpendicular bisector shows
Perpendicular bisector shows
Points equidistant from two points
Shaded region in loci problems shows
Shaded region in loci problems shows
Where ALL conditions are satisfied simultaneously
Required tools for loci constructions
Required tools for loci constructions
Ruler and pair of compasses
Why avoid freehand drawing in constructions?
Why avoid freehand drawing in constructions?
Won't earn full marks in exams
When to leave construction lines visible
When to leave construction lines visible
When question asks for them to be shown
Purpose of construction lines
Purpose of construction lines
Show method, can earn partial credit even if answer has errors
Common mistake in word problems with loci
Common mistake in word problems with loci
Getting distracted by story context
How to approach loci word problems
How to approach loci word problems
Identify geometric conditions, then apply standard techniques
First step in combining multiple loci
First step in combining multiple loci
Read all conditions carefully