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Distance between Two Points
Last updated at April 29, 2026 by Teachoo
Class 9
Chapter 1 Class 9 - Orienting Yourself: The Use of Coordinates (Ganita
- Coordinate System
- Exercise Set 1.1
- Quadrants
- Exercise Set 1.2
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Distance between Two Points in the 2-D Plane
- Section Formula, Mid-point Formula
- End-of-Chapter Exercises
Transcript
Distance between Two Points To find Distance between two points A and B We find the horizontal & vertical distance Then, we use Pythagoras Theorem to find Distance Thus, AB = √(2^2+6^2 ) = √(4+36) = √40 = √(4 × 10) = 𝟐√𝟏𝟎 units And, generally we can write Distance = √((𝒙_𝟐−𝒙_𝟏 )^𝟐+(𝒚_𝟐−𝒚_𝟏 )^𝟐 ) Note: It doesn’t matter if we do 𝒙_𝟐−𝒙_𝟏 or 𝒙_𝟏−𝒙_𝟐 since it is squared, resulting value is positive Same for 𝒚_𝟐−𝒚_𝟏 or 𝒚_𝟏−𝒚_𝟐 Let’s do some examples
