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Revision Notes

Co-ordinate Geometry

Maharashtra Board · Class 9 · Mathematics

Quick revision notes for Co-ordinate Geometry — Maharashtra 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

Basic Concepts - Axes, Origin, and Quadrants

  • The X-axis is a horizontal number line with positive numbers to the right of origin and negative numbers to the left
  • The Y-axis is a vertical number line with positive numbers above the origin and negative numbers below
  • The origin (O) is the point where X-axis and Y-axis intersect, with coordinates (0,0)
2

Coordinates of Points

  • Every point has a unique ordered pair of coordinates (x,y)
  • x-coordinate (abscissa) is the perpendicular distance from Y-axis
  • y-coordinate (ordinate) is the perpendicular distance from X-axis
3

Plotting Points

  • To plot a point (a,b): move 'a' units along X-axis, then 'b' units parallel to Y-axis
  • Start from origin for measuring distances
  • Use positive direction for positive coordinates, negative direction for negative coordinates
4

Lines Parallel to Axes

  • Line parallel to X-axis: all points have the same y-coordinate
  • Equation of line parallel to X-axis at distance 'k' from it: y = k
  • Line parallel to Y-axis: all points have the same x-coordinate

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Full Notes

Key Concepts

A system created by René DescartesEvery point in a plane canQuadrant ILines parallel to X

Frequently Asked Questions

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