Brainlag PlusA locus is every point that follows a rule. Describe loci, combine them, and work out lengths and areas of regions.
Four basic loci
- A fixed distance from a point: a circle.
- A fixed distance from a straight line: two parallel lines (with semicircles round the ends of a segment).
- The same distance from two points: the perpendicular bisector.
- The same distance from two lines: the angle bisector.
"Less than" means the region inside; "at least" means outside.
The rest of this lesson and its 7 practice questions are in Plus.
Screen 1 of 2, free to read.
- 7 exam-style questions, marked as you go, each with a worked solution
- Anything you get wrong is saved to your flashcards