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📐 Mathematics  ·  Introduction to Three Dimensional Geometry  ·  JEE

The distance between the points (1, 2, 3) and (1, 2, 5) is:

Answer: 2.

  • A 1
  • B 2
  • C 3
  • D 5

Correct answer: B. 2

Explanation: Only the z-coordinate differs: distance = √(0² + 0² + 2²) = 2.

zxyOP(x, y, z)first octant:x>0, y>0, z>0

Concept context

Coordinate axes and planes in space, octants, distance between two points, and the section formula

Read the full Introduction to Three Dimensional Geometry notes →