These are solved class 9 math Ex 1.2 notes applicable for Class 9/ 9^{th}/ SSC-1/ Matric Part-I/ 9th Grade/ SSC Part-I/ High School/ O-Level/ General Science Group/ Humanities Group. Pdf of solved math class chapter 1 (Matrices and Determinants) are provided. The Pdf’s contains notes of exercise 1.2 of matrices and determinants.

## Class 9 Math Ex 1.2 Notes PDF

## Download Class 9 Math Ex 1.2 Solution Notes Pdf

You can download the class 9 math Ex 1.2 solution notes pdf easily by following the below steps.

## Chapter 1 **Exercise 1.2 Solution Notes PDF**

This is the Pdf notes of Solved class 9 math exercise 1.2. It is same for Class 9/ 9^{th}/ SSC-1/ Matric Part-I/ 9th Grade/ SSC Part-I/ High School/ O-Level/ General Science Group/ Humanities Group Math book. The Notes are valid and are included in the syllabus and curriculum of FBISE(**Federal Board of Intermediate &Secondary Education**) , Punjab Boards.

## Types of Matrices

In class 9 math chapter 1 Ex 1.2 types of matrices are discussed. Following are the types of Matrices which are important for exam preparation purposes.

### 1) Row Matrix:

A matrix is called a row matrix when it has only 1 row. ( There can be multiple columns in a row matrix ). eg 1-by-3 Matrix.

### 2) Column Matrix:

A matrix is called a column matrix when it has only 1 column. (There can be multiple rows in a column matrix). eg 3-by-1 Matrix.

### 3) Rectangular Matrix:

A matrix is called as rectangular matrix when the number of rows are not equal to the number of columns. eg 2-by-3 Matrix (This matrix has 2 rows and 3 columns).

### 4) Square Matrix:

A matrix is called a square matrix when the number of rows and number of columns are same. eg 3-by-3 matrix (This matrix has 3 rows and 3 columns).

### 5) Null or Zero Matrix:

A matrix is called a Null or Zero Matrix when if all the entries are 0

### 6) Transpose of a Matrix:

A matrix obtained by changing the rows into columns or columns into

rows of a matrix is called transpose of that matrix.

### 7) Negative of a Matrix:

Let A be a matrix. Then its negative, -A is obtained by changing the signs of all

the entries of A

### 8) Diagonal Matrix:

square matrix A is called a diagonal matrix if at least any one of the entries of

its diagonal is not zero and non-diagonal entries are zero.

### 9) Skew-Symmetric Matrix:

A square matrix A is said to be skew-symmetric, if At= -A.

### 10) Identity Matrix:

A diagonal matrix is called identity (unit) matrix if all diagonal entries are 1.

It is denoted by I.

## Conclusion

These are the types of matrices discussed and practices in class 9 math ex 1.2 notes Matrices and Determinants. These types of easy to learn and yet hold very importance in board exams for MCQs short question purposes.

Moreover learning Matrices and Determinants properly will help you in the basic understanding of many modern algorithms and technology and physics laws.

class 9 math ex 1.2 notes are provided to you for better learning make sure to utilize them!

Previous Exercise

Next Exercise