**Class 9 Maths - Important Identities**

(a+b)² = a² + 2ab+ b²

(a–b)² = a² –2ab + b²

a² – b² = (a+b)(a–b)

Showing posts with label **class9-maths**. Show all posts

Showing posts with label **class9-maths**. Show all posts

**Q1**: Simplify $\sqrt[4]{32}$ ?

**Answer**:

$\sqrt[4]{32} = \left ( 32 \right )^{\frac{1}{4}} $

$= \left ( 2^5 \right )^{\frac{1}{4}}$

$ = \left ( 2^4 . 2^1 \right )^{\frac{1}{4}} $

$= \left ( 2^4 \right )^{\frac{1}{4}}.(2)^{\frac{1}{4}}$

$= 2.\sqrt[4]{2}$

**Choose the correct option in each of the following questions:**

**Q1. Which of the following is a rational number?**

(a) 2√3

(b) π

(c) 0

(d) √3 + 1

**Q2. Every point on a number line represents**

(a) a rational number

(b) a natural number

(c) an irrational number

(d) a real number

Learning is a continual process. To improve scores, the best way is to learn and practice. Solving question papers help students to evaluate their knowledge and familarise with different types of question patterns being asked in examination.

Eduvictors provides CBSE Previous Year Papers and Sample Question Papers for Class 9 Maths, Science, Social, English, Hindi and Sanskrit with/without solutions to help students in their board exam preparation.

1. CBSE New Pattern 15 Sample Paper Mathematics Class 9 for 2021 Exam with reduced Syllabus

Here attached the Maths Sample Question Paper (2020-2021).

**Q1: ABCD is a parallelogram such that its diagonals are equal. What is the measure of ∠ABC?**

**Answer**: Since diagonals are equal, it must be a rectangle or a square. ∴ ∠ABC = 90°

**Q2: Is rhombus a kite or a parallelogram?**

**Answer**: Both

**Q3: In a parallelogram ABCD, if ∠C = 80° then what is the measure of ∠A? **

**Answer**: In a parallelogram, opposite angles are equal, ∴ ∠A = ∠C = 80°

**MCQs (Q1 - Q10)**

**Q1. The diameter of a circle is also a **

(a) secant

(b) tangent

(c) radius

(d) chord

**Q2. An equilateral triangle ABC is inscribed in a circle with centre O.The measure of ∠BOC is **

(a) 110⁰

(b) 100⁰

(c) 120⁰

(d) 130⁰

**CBSE Class 9 - Maths**

**1**. Two angles are called adjacent angles, if

(i) they have the same vertex,

(ii) they have a common arm and

(iii) their non-common arms are on either side of the common arm.

**2**. Two adjacent angles are said to form a linear pair of angles, if their non-common arms are two opposite rays.

Class 9 - Mathematics

1. A plane figure bounded by three line segments is called a **triangle**.

2. A triangle can be:

- equilateral (all three sides are equal)

- isosceles (any two sides are equal)

- scalene (all three sides are unequal)

3. A triangle in which one of the angles measures 90° is called a **right-angled triangle** or simply a right triangle.

4. The sum of the angles of a triangle is always **180°**

5. Two figures are congruent, if they are of same shape and same size. Congruent triangles are exactly identical.

The part-5 video gives a solution to a typical problem on rationalisation. This type of problem is commonly asked in question papers. The first step to solve this kind of problem is to rationalise each term individually. The video covers the solution for a long type of answer based question. In this series, we'll try to present solutions for more HOTS and typical problems for students of mathematics of class 9 For study Notes, Worksheets, Question Papers and Assignments for CBSE Class 6 - 12, do check our website www.eduvictors.com

The objective of rationalizing a denominator is to make it easier to understand what the quantity really is by removing irrationals from the denominators. The video series provides solutions for typical problems related to rationalization of irrational numbers covered under chapter real numbers. The video covers the solution for a long type of answer based question. In this series, we'll try to present solutions for more HOTS and typical problems for students of mathematics of class 9 For study Notes, Worksheets, Question Papers and Assignments for CBSE Class 6 - 12, do check our website www.eduvictors.com

The video series provides solutions for typical problems related to rationalization of irrational numbers covered under chapter real numbers. The video covers the solution for a long type of answer based question.

If the denominator of an expression is a surd, it can be reduced to an expression with rational denominator.

If the product of two surds is a rational number, then each one of them is a rationalizing factor of the other.

In this series, we'll try to present solutions for more HOTS and typical problems.

The video series provides solutions for typical problems related to rationalization of irrational numbers covered under chapter real numbers. The video covers the solution for a long type of answer based question.

If the product of two irrational numbers is a rational number, then each number is called the

The syllabus provided by CBSE is largely based on National Curriculum Structure 2005 (published by NCERT) and looks to give chances to understudies to accomplish greatness in learning.

Here are the pdf links for important subjects in Class 9 and Class 10:

Annual Sample Question Paper

Set-2 (2019-20)

Here follows a sample question paper on Maths subject to assess your knowledge about the subject.

For studying you may refer following help guides:

2. Xam Idea Complete Course Class 9 Mathematics (2019-20)

(Solved Worksheet-1)

Yearly (Olympiad) Sample Question Paper

(2019-20)

Here follows a sample question paper on Maths subject to assess your knowledge about the subject.

For studying you may refer following help guides:

2. Xam Idea Complete Course Class 9 Mathematics (2019-20)

CBSE Class 7 Maths

1. A rational number is a number that can be written in the form p/q, where p and q are ________ and q ____ 0.

2. The ________ of a rational number can never be zero.

3. The rational number _______ is neither negative nor positive.

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