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Gujarat Board Class 9 Mathematics — Formula Sheet

Gujarat Board Class 9 Mathematics formula sheet, chapter by chapter — 19 formulas across 5 chapters. Follows the GSEB syllabus.

How to Use the Formula Sheet

  1. Write, don't just read — writing each formula out helps it stick.
  2. Understand the derivation — you can rebuild a formula you half-remember.
  3. Group related formulas — link the ones that build on each other.
  4. Test yourself — cover the sheet and write the formulas from memory.

Chapter-Wise Formulas — 5 Chapters

1

Number System

5 entries
√2 was the first irrational number proved to be irrational
Examples of irrational numbers: √2, √3, √5, √7, π, 0.10110111011110...
Terminating decimal: remainder becomes zero after some steps. Example: 7/8 = 0.875
Irrational + Irrational = Can be rational OR irrational. Example: √2 + (-√2) = 0 (rational); √2 + √3 (irrational)
Rational + Irrational = Always Irrational. Example: 2 + √3 is always irrational
The full Number System formula sheet
2

Polynomials

4 entries
A real number 'a' is called a ZERO of polynomial p(x) if p(a) = 0.
Finding zeros means solving the equation p(x) = 0.
The Remainder Theorem states: When a polynomial p(x) of degree ≥ 1 is divided by a linear polynomial (x – a), the remainder is p(a).
Part 1: If p(a) = 0, then (x – a) is a factor of p(x).
The full Polynomials formula sheet
4

Linear Equations in Two Variables

2 entries
The standard form is ax + by + c = 0, where a and b are not both zero.
Many equations that look different at first can be rearranged into the standard form ax + by + c = 0.
The full Linear Equations in Two Variables formula sheet

2 more chapters below

Formula sheets for all 5 chapters with formulas.

Get the Formula Sheets

Get chapter-wise help for Gujarat Board Class 9 Mathematics

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Frequently Asked Questions

Where can I find Gujarat Board Class 9 Mathematics Formula Sheet?

This page has formula sheet for 5 chapters of Gujarat Board Class 9 Mathematics for the 2026-27 session. Each chapter links to its own page with the full set.

Go through the syllabus first, then work chapter by chapter: learn the ideas, practise questions, and revise with notes and flashcards. Leave time at the end to revise every chapter once more under timed conditions.

Learn the formulas you use most first, and understand what each symbol means so you can apply them. Knowing where a formula comes from helps you rebuild it if you forget it in the exam.

Browse Formula Sheet by Chapter

5 chapters

1

Number System

2

Polynomials

4

Linear Equations in Two Variables

10

Heron's Formula

11

Surface Areas and Volumes

More Mathematics Resources

Gujarat Board Class 9

Practice Quiz

Test yourself with quick quizzes

Important Questions

Exam-style questions with answers

Revision Notes

Key concepts and quick revision points

Chapter Summary

Understand each chapter at a glance

Concept Maps

Diagrams showing how topics connect

Flashcards

Quick-fire cards for active recall practice

Syllabus

Chapter list and the topics in each

Other Gujarat Board Class 9 Subjects

Science