Class 9

exercise 4.2 class 9 solutions

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exercise 4.2 class 9- Linear Equations in Two Variables Solutions: Exercise 4.2 1. Which one of the following options is true, and why? y = 3x + 5 has (i) a unique solution, (ii) only two solutions, (iii) infinitely many solutions The correct option is (iii) infinitely many solutions. Reason: For every real value of … Read more

exercise 4.1 class 9 with solutions

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exercise 4.1 class 9 – Linear Equations in Two Variables Solutions: Exercise 4.1 1. The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement. Let the cost of the notebook be ₹ x. Let the cost of the pen be ₹ y. … Read more

Exercise 5.1 solutions

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exercise 5.1

Class 9 Maths Chapter 5 Exercise 5.1 – Euclid’s Geometry Exercise 5.1 Solutions (Class 9) Introduction to Euclid’s Geometry 1. Which of the following statements are true and which are false? Give reasons for your answers. (i) Only one line can pass through a single point. False. An infinite number of lines can be drawn … Read more

class 9 maths chapter 6 exercise 6.1

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class 9 maths chapter 6 exercise 6.1

class 9 maths chapter 6 exercise 6.1- Lines and Angles (Class 9) Exercise 6.1 Solutions (Class 9) Lines and Angles 1. In Fig. 6.13, lines AB and CD intersect at O. If ∠AOC + ∠BOE = 70° and ∠BOD = 40°, find ∠BOE and reflex ∠COE. ∠AOC = ∠BOD (Vertically opposite angles). Since ∠BOD = … Read more

triangles class 9 extra questions

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triangles class 9 extra questions (R.D. Sharma Level – Class 9) Extra Practice Questions Triangles (R.D. Sharma Level – Class 9) 1. In quadrilateral ACBD, AC = AD and BC = BD. Prove that AB is the perpendicular bisector of CD. Proof: First, in ΔACB and ΔADB: • AC = AD (Given) • BC = … Read more

exercise 7.3 class 9th

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exercise 7.3 class 9th

exercise 7.3 class 9th- Triangles (Class 9) Exercise 7.3 Solutions (Class 9) Triangles 1. ΔABC and ΔDBC are two isosceles triangles on the same base BC… Show that: (i) ΔABD ≅ ΔACD: In ΔABD and ΔACD: • AB = AC (Given, ΔABC is isosceles) • DB = DC (Given, ΔDBC is isosceles) • AD = … Read more

class 9th exercise 7.2

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class 9th exercise 7.2

class 9th exercise 7.2 – Triangles (Class 9) Exercise 7.2 Solutions (Class 9) Triangles 1. In an isosceles triangle ABC, with AB = AC, the bisectors of ∠B and ∠C intersect each other at O. Join A to O. Show that: (i) OB = OC (ii) AO bisects ∠A. (i) Show OB = OC: In … Read more

class 9th exercise 7.1 solution

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class 9th exercise 7.1

class 9th exercise 7.1 – Triangles (Class 9) Exercise 7.1 Solutions (Class 9) Triangles 1. In quadrilateral ACBD, AC = AD and AB bisects ∠A. Show that ΔABC ≅ ΔABD. What can you say about BC and BD? Proof: In ΔABC and ΔABD: • AC = AD (Given) • ∠CAB = ∠DAB (AB bisects ∠A) … Read more