The five pictures
A standard method from Loci: the steps.
Steps
| Condition | Locus |
|---|---|
| distance r from a point C | circle, centre C, radius r |
| equidistant from A and B | perpendicular bisector of AB |
| distance d from a line | two lines parallel to it, one on each side |
| equidistant from two parallel lines | the parallel line halfway between |
| equidistant from two intersecting lines | the two angle bisectors |
For the whole topic, read Loci: key points, common mistakes and how the DSE tests it.