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Revision Notes

Co-Ordinate Geometry

Telangana Board · Class 9 · Mathematics

Quick revision notes for Co-Ordinate Geometry — Telangana Board Class 9 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

45 questions20 flashcards5 concepts

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Key Topics to Revise

1

Introduction to Coordinate System

  • We need exactly two references to locate a point uniquely in a plane
  • A coordinate system uses two perpendicular number lines intersecting at origin
  • The horizontal line is called X-axis and vertical line is called Y-axis
2

Cartesian Plane and Quadrants

  • The coordinate plane is divided into four regions called quadrants
  • Quadrants are numbered I, II, III, IV in anticlockwise direction starting from top-right
  • Each quadrant has specific sign patterns for coordinates
3

Plotting Points - Step-by-Step Method

  • Start from origin (0,0) for every point
  • Move horizontally first (x-coordinate), then vertically (y-coordinate)
  • Positive x means move right, negative x means move left
4

Special Points and Lines

  • Points on X-axis have y-coordinate = 0, written as (x, 0)
  • Points on Y-axis have x-coordinate = 0, written as (0, y)
  • Origin has both coordinates = 0, written as (0, 0)

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Full Notes

Key Concepts

To locate a point exactly onNamed after René DescartesThe coordinate plane is divided intoEvery point is represented as (xTo plot point P(4

Frequently Asked Questions

What are the important topics in Co-Ordinate Geometry for Telangana Board Class 9 Mathematics?
Co-Ordinate Geometry covers several key topics that are frequently asked in Telangana Board Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Co-Ordinate Geometry — Telangana Board Class 9 Mathematics?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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