ICSE Class 10
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Geometry

Loci

Official ICSE Class 10 syllabus — session 2026-2027.

3. Geometry — (b) Loci

Loci: Definition, meaning, Theorems and constructions based on Loci.

(i) The locus of a point at a fixed distance from a fixed point is a circle with the fixed point as centre and fixed distance as radius.

(ii) The locus of a point equidistant from two intersecting lines is the bisector of the angles between the lines.

(iii) The locus of a point equidistant from two given points is the perpendicular bisector of the line joining the points.

Proofs not required.

Source: CISCE ICSE Class 10 Syllabus 2026-2027