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Formula Sheet

Coordinate Geometry — Formula Sheet

Tamil Nadu Board · Class 9 · Mathematics

5 formulas from Coordinate Geometry (Tamil Nadu Board Class 9 Mathematics) on one page, grouped by topic. Covers The Cartesian Coordinate System, Distance.

45 questions25 flashcards5 formulas & key relations5 concepts

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A labeled diagram showing the x-axis, y-axis, origin, and a point (x, y) in the first quadrant, illustrating the basic setup of a Cartesian coordinate system.
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5 Entries · 3 Sections

Formulas and Key Relations

Mid-Point Formula

The x-coordinate of M = average of x-coordinates = (x₁ + x₂)/2.

The y-coordinate of M = average of y-coordinates = (y₁ + y₂)/2.

Section Formula

When m = n = 1, the section formula reduces to the mid-point formula.

Key relations

The distance d between two points P(x₁,y₁) and Q(x₂,y₂) is calculated using the formula: d = √[(x₂-x₁)² + (y₂-y₁)²].

The midpoint M of a line segment joining points A(x₁,y₁) and B(x₂,y₂) is M = ((x₁+x₂)/2, (y₁+y₂)/2).

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Frequently Asked Questions

What are the important topics in Coordinate Geometry for Tamil Nadu Board Class 9 Mathematics?
Key topics in Coordinate Geometry include The Cartesian Coordinate System, Distance Formula, Mid-Point Formula, Section Formula. Study these first, then practise questions on each for Class 9 exams.
How many formulas are in Coordinate Geometry?
This sheet lists 5 formulas from Coordinate Geometry, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Coordinate Geometry for Class 9 exams?
Learn the core ideas first, then work through the 45 practice questions on Coordinate Geometry. Revise 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.

More resources for Coordinate Geometry

All Tamil Nadu Board Class 9 Mathematics Formula Sheet

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