NCERT Mathematics · Class XI · Chapter 11
INTRODUCTION TO THREE DIMENSIONAL GEOMETRY
Previous Years' Objective Questions — Entrance Exam Series
Q =30
From =1993
To =2023
Exams =4
JEE MainJEE AdvancedBITSATKVPY
XY Planez = 0 · 2D distance
YZ Planex = 0 · section formula
XZ Planey = 0 · centroid
- Coordinate Axes & Planes
- Distance Formula in 3D
- Section Formula in 3D
- Centroid of Triangle in 3D
- Distance from Axes & Planes
- Octants
- Visualise the 3D coordinate system before each question.
- Use distance formula — don't confuse 2D and 3D versions.
- Section formula: m:n internal vs external division.
- Timer: 90s average per question.
- Review → Submit.
3D Geometry in Class XI lays the groundwork for vectors and 3D lines/planes in Class XII. These 30 questions from 1993–2023 test distance formula, section formula, and coordinate geometry in all three planes.
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