TRIANGLES | SPEED NOTES | MATHEMATICS | CBSE | CLASS 9 TRIANGLES | CHAPTER NOTES Similar Geometric Figures: Two geometric figures which...

Introduction to Circles There are many objects in our life which are round in shape. A few examples are the clock, dart board, cartwheel,...

Probability Probability is the study of the uncertainty. The uncertainty of any doubtful situation is measured by means of Probability....

Rest And Motion Motion: An object is said to be in motion when its position changes with time. Rest: An object is said to be at rest when...

Force : Push or pull is called Force. Example: We push or pull to open a door. Effects of Force Force can change the shape and size of an...

Basic terms and Definitions 1. Point - A Point is that which has no component. It is represented by a dot. 2. Line - When we join two...

Chapter 13 - WhyDo We Fall Ill 1. Health andits Failure The significance of Health Health is a state of complete physical, mental and...

Chapter 6 - Tissues Are plants and Animals made of same types of tissues? Plants are stationary, and hence are provided with some tissues ...

Chapter 5 - The Fundamental Unit of Life What are Living organisms made up of? All living organisms are made up of cells. Cell is...

Chapter 3- Atoms andMolecules Summary of Atoms andMolecules Law of conservation of mass: According to this law,during any physical or...

Chapter 4- Structure of Atom Summary ofStructure of Atom Ø Ø Atom is the smallest particle of an element. It has two parts: nucleus...

Chapter 12- Sound Introduction You have learnt that sound is a form of energy. It is produced by vibrations. Sound waves are...

Chapter 14 - Natural Resources Materials provided by nature on earth which can be used by living organisms are termed to be natural ...

Chapter 7 -Diversity in Living Organisms 1. What isthe basis of classification? Organisms differ in their form, structure and mode of...

Chapter 15 - Improvements in Food Resources Food is essential for all living organisms to live. We depend on plants and animals for ...

Revision Notes - CBSE 09 Math - Linear Equations in Two Variables Linear Equations The equation of a straight line is the linear...

Cartesian System A plane formed by two number lines, one horizontal and the other vertical, such that they intersect each other at their...

MATTER IN OUR SURROUNDINGS IS MATTER AROUND US PURE? ATOMS AND MOLECULES STRUCTURE OF THE ATOM THE FUNDAMENTAL UNIT OF LIFE TISSUES...

SURFACE AREAS AND VOLUMES | SPEED NOTES Introduction : We are familiar with the shapes of solids like right circular cylinder, right...

Chapter 3- Atoms andMolecules Summary of Atoms andMolecules Law of conservation of mass: According to this law,during any physical or...

Euclid’s Definitions Euclid’s Axioms and Postulates Axioms Postulates Equivalent Versions of Euclid’s Fifth Postulate Theorem...

Chapter – 13 Sound Sound: Vibrations that travel through the airor another medium and can be heard when they reach a person's or animal's...

NUMBER SYSTEMS POLYNOMIALS COORDINATE GEOMETRY LINEAR EQUATIONS IN TWO VARIABLES INTRODUCTION TO EUCLID’S GEOMETRY LINES AND ANGLES...