Coordinates Class 9 Maths Notes

These Coordinates revision notes summarise the full first chapter of the new Ganita Manjari book in one place. Our coordinates class 9 maths notes explain how to plot a point, read a graph, name a quadrant, and measure the distance between two points, all in plain and simple language.

• What they cover: axes, the origin, quadrants, the distance formula, and midpoints.
• Who they help: Class 9 students who want a fast, clear revision before a test.
• Why they save time: every key idea and result sits on one short page.

These notes are prepared by subject teachers, matched to the current 2026-27 NCERT Ganita Manjari book, and written so a Class 9 student can revise the whole chapter quickly.

What Do Class 9 Maths Coordinates Notes Cover?

The coordinates class 9 maths notes cover the full chapter in short, easy parts. You start with the two axes and the origin, then learn to plot and read points written as (x, y). Next you meet the four quadrants and their sign pattern. The notes finish with the distance formula and the midpoint idea, which both come back in Class 10.

Video Walkthrough

Source: PW Class 9 - NEEV on YouTube

Coordinates Class 9 Maths Topic-by-Topic Summary

Here is a short summary of each main topic in the chapter. Read one part at a time and try a quick sketch as you go.

The Coordinate Plane and Axes

A coordinate plane is made from two number lines that cross at right angles. The horizontal line is the x-axis and the vertical line is the y-axis. Their crossing point is the origin, written O(0, 0). Every point is named by an ordered pair (x, y). The first number tells you how far to move across, and the second tells you how far to move up or down. To plot a point, start at the origin, go across first, then up or down.

The Four Quadrants and Signs

The two axes cut the plane into four regions called quadrants. They are numbered anticlockwise from the top right. Quadrant I has signs (+, +), Quadrant II has (-, +), Quadrant III has (-, -), and Quadrant IV has (+, -). A point with a zero sits on an axis: (x, 0) lies on the x-axis and (0, y) lies on the y-axis. Just reading the two signs tells you the quadrant, so you can check an answer without plotting.

Distance and Midpoint

To find the gap between two points, drop a horizontal and a vertical line to make a right triangle, then use the Baudhayana-Pythagoras rule. The distance between (x₁, y₁) and (x₂, y₂) is √(x₂ - x₁)² + (y₂ - y₁)². The distance from the origin is simply √x² + y². The midpoint of a segment is the average of the endpoints, given by (x₁ + x₂2, y₁ + y₂2). Three points are collinear when the two shorter distances add up to the longest one.

Key Points and Results to Remember in Coordinates

These are the must-know facts and formulas from the chapter. Keep this short list handy for last-minute revision.

How to Revise Coordinates Quickly

To revise fast, skim the coordinates class 9 maths notes above, then plot four points by hand, one in each quadrant. Next, work one distance sum and one midpoint sum without looking. This short loop fixes the chapter in your memory. The time you need depends on whether this is a revision or a first read.

How will Collegedunia's Notes Help You with Coordinates?

Collegedunia gives you these coordinates class 9 maths notes as one clean revision page that matches the new book exactly. You get the ideas, the formulas, and the common traps together, so revision is quick.

• 2026-27 book match: Every point follows the new Ganita Manjari chapter, not the old syllabus.
• Plain language: Short sentences and simple words make each idea easy to read.
• Formulas in one box: The distance and midpoint rules sit together for fast recall.
• Free PDF: Download the notes and revise offline before your annual exam.

More Coordinates Maths Class 9 Resources

NCERT Notes for Class 9 Maths: All Chapters

Use the table below to open the NCERT Notes for any other chapter of the new Class 9 Maths book.