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Coordinate Geometry

Gujarat Board · Class 9 · Mathematics

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

45 questions20 flashcards4 concepts

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Key Topics to Revise

1

Introduction to Position and Location

  • To locate a point in a plane, we need two independent pieces of information
  • Real-life examples include house addresses (street number + house number) and seating plans (row + column)
  • A single reference point is insufficient to precisely locate a position in a plane
2

The Cartesian System

  • Named after René Descartes, the French mathematician who developed this system
  • Consists of two perpendicular number lines intersecting at their origins
  • The horizontal line is called the x-axis, the vertical line is called the y-axis
3

Coordinates of a Point

  • Every point in the Cartesian plane has unique coordinates (x,y)
  • x-coordinate (abscissa): perpendicular distance from y-axis
  • y-coordinate (ordinate): perpendicular distance from x-axis
4

Points on Axes and Quadrants

  • Points on x-axis have coordinates (x,0) where y-coordinate is always 0
  • Points on y-axis have coordinates (0,y) where x-coordinate is always 0
  • Origin has coordinates (0,0)

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Full Notes

Key Concepts

A plane formed by two perpendicularEvery point in the planeThe coordinate axes divide the planeThe origin O(0

Frequently Asked Questions

What are the important topics in Coordinate Geometry for Gujarat Board Class 9 Mathematics?
Coordinate Geometry covers several key topics that are frequently asked in Gujarat 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 Coordinate Geometry — Gujarat 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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