NCERT Solutions for Class 9 Maths Chapter 7 Triangles Ex 7.1 Ex 7.1 Class 9 Maths Question 1.In quadrilateral ACBD, AC = AD and AB bisects ∠ A (see figure). Show that ∆ABC ≅ ∆ABD. What can you say about BC and BD?Solution:In quadrilateral ACBD, we have AC = AD and AB being the bisector of…
NCERT Solutions for Class 9 Maths Chapter 6 Lines and Angles Ex 6.1 Maths Question 1In figure, lines AB and CD intersect at 0. If ∠AOC + ∠BOE = 70° and ∠BOD = 40°, find ∠BOE and reflex ∠COE.Solution:Since AB is a straight line,∴ ∠AOC + ∠COE + ∠EOB = 180°or (∠AOC + ∠BOE) + ∠COE…
NCERT Solutions for Class 9 Maths Chapter 5 Introduction to Euclid Geometry Ex 5.1 Ex 5.1 Class 9 Maths Question 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.(ii) There are an infinite number of lines which pass through two…
NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables Ex 4.1 Ex 4.1 Class 9 Maths Question 1.The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement.(Take the cost of a notebook to be Rs. x and that of…
NCERT Solutions for Class 9 Maths Chapter 3 Coordinate Geometry Ex 3.1 Ex 3.1 Class 9 Maths Question 1.How will you describe the position of a table lamp on your study table to another person?Solution:To describe the position of a table lamp placed on the table, let us consider the table lamp as P and…
NCERT Solutions for Class 9 Maths Chapter 2 Polynomials Ex 2.1 Ex 2.1 Class 9 Maths Question 1.Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer.(i) 4×2 – 3x + 7(ii) y2 + √2(iii) 3 √t + t√2(iv) y+ 2y(v) x10+ y3+t50Solution:(i) We have 4×2 – 3x + 7 =…
NCERT Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.1 Ex 1.1 Class 9 Maths Question 1.Is zero a rational number? Can you write it in the form pq,where p and q are integers and q ≠0?Solution:Yes, zero is a rational number it can be written in the form pq.0 = 01 = 02 = 03 etc. denominator q can also…
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