R
Rishtaara
NCERT Class 11 Mathematics
Lesson 12 of 15Article14 min

Ch 11 — Introduction to Three Dimensional Geometry

Extend the plane to 3D: point (x,y,z), coordinate planes, and distance between two points. This is the gateway to Class 12 vectors and 3D lines/planes.

Coordinates in space

Extend the plane to 3D: point (x,y,z), coordinate planes, and distance between two points. This is the gateway to Class 12 vectors and 3D lines/planes.

  • Octants: signs of x, y, z.
  • Distance from origin: √(x²+y²+z²).
Read this alongside the official NCERT chapter: Introduction to Three Dimensional Geometry — https://ncert.nic.in/textbook.php?kemh1=11-16 (full book index: https://ncert.nic.in/textbook.php?kemh1=0-16).