CBSE · Class 6-12

Class 11 · Mathematics (041)

Unit 11 · Class 11Mathematics (041)

Coordinate Geometry

Introduction to Three-Dimensional Geometry

Coordinates in 3D, distance between two points, and section formula.

Formative-only for boards

Section formula in 3D

Learn these concepts — they won't appear in the CBSE 2026-27 board paper.

Lessons

2 concepts

1
3D Coordinates & Octants
Three mutually perpendicular axes divide space into 8 octants.
2
Distance Formula
Between $(x_1, y_1, z_1)$ and $(x_2, y_2, z_2)$ : $\sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2 + (z_2 - z_1)^2}$ .

Skills to practise

Skill · medium

Introduction to Three-Dimensional Geometry — Practice (coming soon)

Practice bank for this unit is in progress. You can still read the lessons above.