## Revision Notes for Class 8 Maths

## Revision Notes for Class 8 Maths

**Revision Notes for Class 8 Maths**provided here are prepared by Studyrankers experts who have given every detail of the chapter which are important for developing student's skill. It will come handy if you have less time and want to complete the chapter. This will provide you wth in depth knowledge of topics so you can understand them easily.

**Class 8 Maths Revision Notes**is prepared chapterwise so anyone looking for spcific chapter can find it in no time and utilize them for their benefits.

### Chapterwise Revision Notes for Class 8 Maths

Chapter 1 - Rational Numbers

Revision Notes for Chapter 1 Class 8 Maths has many topics such as closure, commutativity, associativity properties of rational numbers, representation of rational n umbers on the number line and rational numbers between two rational numbers.

Chapter 2 - Linear Equations in One Variable

There are variety of important topics that have been discussed in this chapter such as linear expression in one variable, solving equations having variable on both sides, application of linear equations and reducing equations to simpler form.

Chapter 3 - Understanding Quadrilaterals

We will understand about classification of polygons. Polygons can be classified as a triangle (3 sides), quadrilateral (4 sides), pentagon (5 sides), hexagon (6 sides) and many more. We will also talk about properties of quadrilaterals like parallelograms, rhombus, rectangle, etc.

Chapter 4 - Practical Geometry

This chapter is about the construction of specific quadrilateral. A quadrilateral can be constructed when-

Four sides and one diagonal are given

Two diagonals and three sides are given

Two adjacent sides and three angles are given

Three sides and two included angles are given

When other special properties are known.

Chapter 5 - Data Handling

Chapter 5 Class 8 Maths Revision Notes is about organizing a data and grouping a data. Also, we will basic details about Probability whose important formula is Probability of an event (P) = Number of outcomes that make an event/ Total number of outcomes of the experiment.

Chapter 6 - Squares and Square Roots

We are going to discuss about properties of square numbers, finding the square of a number, square roots, finding square root by division method, square roots of decimals.

Chapter 7 - Cubes and Cube Roots

This chapter deals with the cubes, cube root through prime factorisation method and cube root of a cube number.

Chapter 8 - Comparing Quantities

Class 8 Revision Notes of Maths Chapter 8 deals with various concepts which will become important in higher classes so you muts understand these topics. The topics are ratios and percentages, finding the increase or decrease percent, finding discounts, sales tax or Goods and Services Tax, compound Interest, applications of Compound Interest Formula.

Chapter 9 - Algebraic Expressions and Identities

First we will start studying by knowing about monomials, binomials and polynomials. After that we will study addition, subtraction and multiplicationof algebraic expressions. Then after we will know about identites.

Chapter 10 - Visualising Solid Shapes

In this chapter, we are focused on three dimensional shapes and learn about Euler's formula that is: F + V - E = 2, where

‘F’ stands for the number of faces

‘V’ stands for the number of vertices

‘E’ stands for the number of edges.

Chapter 11 - Mensuration

Chapter 11 Revision Notes for Class 8 Maths deals about the area and perimeter of Rectangle, Square, Triangle, Parallelogram, Circle, Trapezium, Polygon and Quadrilateral and also volume of Cube, Cuboid and Cylinder.

Chapter 12 - Exponents and Powers

This chapter includes topics such as powers with negative exponents, laws of exponents, use of exponents to express the numbers in standard form.

Chapter 13 - Direct and Inverse Proportions

Two quantities are proportional if as one of them changes, the other one also changes accordingly. Two variables x and y are said to be in inverse proportion, when x increases y decreases and vice-versa.

Chapter 14 - Factorisation

Factorisation process is the reverse of multiplication. We will study about four different methods of factorisation such as method of common factors, regrouping terms, using identities, factors of the form (x + a) (x + b). Also we will study division of a polynomial by a monomial.

Chapter 15 - Introduction to Graphs

We will study different types of graphs such as bar graphs, pie graphs, histogram, line graphs and linear graphs and also application of graphs.

Chapter 16 - Playing With Numbers

There are variety of topics in this chapter but the most important one is justifying tests of divisibility.

#### Why are some important formulas of Chapter Mesnuration

Area of Trapezium = ½ x (Sum of the length of parallel sides) x Distance between them

2. Area of Rhombus = ½ x Product of its diagonals

3. Total Surface Area of a Cuboid = 2(lb + bh + hl)

4. Total Surface Area of a Cube = 6l2

5. Total Surface Area of a Cylinder = 2Ï€r (r + h)

6. Volume of a Cuboid = l x b x h

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