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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?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall 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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