Find the best tutors and institutes for Class 9 Tuition
Search in
In your previous classes, you have studied about triangles and several properties
related to them. You have also learned that ‘tri’ refers to ‘three’, a triangle has three
sides, three vertices and three angles. In class 9 chapter 7, you’ll study about the
congruence of triangles, rules of congruence, inequalities in a triangle etc. in-detail.
‘Triangles’, is one of the most important chapters in the NCERT class 9 Maths syllabus,
in terms of weightage, as it carries 28 marks in total in class 9 final exam. Moreover, in-
depth knowledge of triangles is of great help in both professional and day to day life.
7.1 Introduction
7.2 Congruence of Triangles
7.3 Criteria for Congruence of Triangles
7.4 Some Properties of a Triangle
7.5 Some More Criteria for Congruence of Triangles
7.6 Inequalities in a Triangle
7.7 Summary
Section 7.2 In this section, you’ll learn about congruent figures. ‘Congruent’ means
‘equal’ in every respect. This section gives an introduction about the congruence of
triangles and some of their properties.
Section 7.3 – In this section, you’ll learn about two criteria for congruence of triangles
such as Side-Angle-Side (SAS) and Angle- Angle-Side (AAS).
Section 7.4 – Here you’ll acquire knowledge on some of the properties of a triangle
whose two sides are equal, based on the results of congruence of triangles.
Section 7.5 – You’ll learn about some more interesting criteria for congruence of
triangle such as Side-Side-Side (SSS) and Right angle – Hypotenuse – Side (RHS).
Section 7.6 – Here, you’ll learn about inequalities related to triangles. Studying about
inequalities helps us compare two or more objects or figures. Besides that, you’ll also
learn about relations between unequal sides and unequal angles of triangles.
Topics and sub-topics in this chapter are explained meticulously with theorems &
proofs, examples & solutions, and axioms. Solved examples are also given for better
understanding. To know more about the Class 9 Maths Chapter 7, you should explore
the exercises below. You can also download the NCERT Solutions for Class 9 Maths
Chapter 7 PDF, solved by expert maths trainers.
Published on 2020-01-29 09:34:20 by arunima. Last Modified on 2020-01-29 09:34:20
How helpful was it?
How can we Improve it?
Please tell us how it changed your life *
Please enter your feedback
Recommended Articles
The Rising Problems in Indian Government School
With the mushrooming of international and private schools, it may seem that the education system of India is healthy. In reality, only 29% of children are sent to the private schools, while the remaining head for government or state funded education. So, to check the reality of Indian education system it is better to look...
Science, Arts Or Commerce - Which One To Go For?
Once over with the tenth board exams, a heavy percentage of students remain confused between the three academic streams they have to choose from - science, arts or commerce. Some are confident enough to take a call on this much in advance. But there is no worry if as a student you take time to make choice between - science,...
How To Choose The Right School For Children?
Quality education does not only help children to get a successful career and life, but it also hugely contributes to society. The formal education of every child starts from school. Although there are numerous schools, parents find it challenging to choose the right one that would fit their child. It is difficult for them...
Find best tutors for Class 9 Tuition Classes by posting a requirement.
Get started now, by booking a Free Demo Class