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Revision Notes

Co-ordinate Geometry

ICSE · Class 9 · Mathematics

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

45 questions24 flashcards5 concepts

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A diagram illustrating the basic concept of coordinate geometry, showing how a point's position is represented by a pair of numbers (coordinates) relative to two perpendicular number lines.
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Key Topics to Revise

1

Introduction to Co-ordinate Geometry

  • Co-ordinate geometry uses coordinates to represent position of points with respect to two perpendicular number lines
  • It connects algebra (equations) with geometry (shapes and positions)
  • Essential for solving problems involving distance, position, and relationships between points
2

Variables - Dependent and Independent

  • In linear equations like y = mx + c, x is independent variable and y is dependent variable
  • If equation is written as x = ay + b, then x is dependent and y is independent
  • The subject of the formula determines which variable is dependent
3

Ordered Pairs

  • Ordered pair is a pair of numbers written in specific order, separated by comma, enclosed in brackets
  • Order matters: (5,7) ≠ (7,5)
  • First component is called first element, second component is called second element
4

Cartesian Plane and Coordinate System

  • Cartesian plane consists of two mutually perpendicular number lines intersecting at origin
  • Horizontal line is x-axis, vertical line is y-axis
  • Origin O is the intersection point with coordinates (0,0)

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Key Concepts

A system that uses pairsIn equations like y = 3xA pair of numbers writtenThe coordinate plane is divided intoTo plot a point (a

Frequently Asked Questions

What are the important topics in Co-ordinate Geometry for ICSE Class 9 Mathematics?
Co-ordinate Geometry covers several key topics that are frequently asked in ICSE 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 — ICSE 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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