ICSE Class 9 Mathematics Revision Notes Chapter 9 - Triangles

ICSE

ICSE Class 9 Mathematics Revision Notes Chapter 9 - Triangles

Last updated date: 25th Apr 2024

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Revision Notes for ICSE Class 9 Mathematics Chapter 9 - Free PDF Download

Free PDF download of Class 9 Mathematics Chapter 9 - Triangles (Congruency in Triangles) Revision Notes & Short Key-notes prepared by our expert Math teachers according to the CISCE guidelines. Register for Maths Tuitions on Vedantu.com to clear your doubts.

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Triangle Chapter 9 Class 9 ICSE

A triangle is a closed plane figure that has three sides. Every triangle has three sides, three vertices and the three angles make a sum of 180 degrees.

In this Class 9 Chapter 9 of Maths, you learn about the congruency of the triangles. Two triangles are congruent if they coincide on placing one over the other. ‘⩭’ this is the symbol we use to represent the congruent triangles. We read it as 'is congruent to'.

Congruent triangles always coincide by superposition, i.e., placing one triangle over the other. In congruent triangles, we know the sides and angles that coincide by superposition as corresponding sides and corresponding angles.

There are different conditions for the congruence of triangles.

The three sides of one triangle have the same length as the sides of the other triangle. SSS is the abbreviation for it.
The two sides and one angle of one triangle have the same length and angle as the other triangle. SAS is the abbreviation for it.
The two angles and one side of one triangle have the same length and angles as the other triangle. ASA is the abbreviation for it.
The two angles and one side of one triangle are equal to the two angles and one corresponding side of the other triangle. AAS is the abbreviation for it.
Two right triangles are congruent if the hypotenuse and one side of one triangle are equal to the other triangle. RHS is the abbreviation for it.

Download the ICSE Class 9 Revision Notes Chapter 9

Download the short and crispy notes made by the excellent faculties of maths of class 9 to make it easy for students to revise chapters readily in minimum time. Vedantu maths teachers have made these notes concerning ICSE exams. Chapter 9 of class 9 is essential to learn from an exam point of view.

It is easy to download the notes on your mobile phone, install the Vedantu learning app, and download notes of the remaining chapters to prepare well for exams.

FAQs on ICSE Class 9 Mathematics Revision Notes Chapter 9 - Triangles

1. What is the difference between the orthocentre and centroid of the triangle?

Orthocentre is the common point of intersection of all the three altitudes in a triangle, whereas the centroid is the common point of intersection of all the three medians. The Median is the line that joins one of the vertices and the midpoint of the opposite side and divides the triangle into two equal parts. The altitude is a perpendicular line that you draw from the vertex of that opposite side

2. How to download other resources of Class 9 Maths ICSE?

You can download all the resources from the study material section on the Vedantu. Class 9 Maths of ICSE has covered plenty of absorbing topics to learn. Maths is a subject that needs a rigorous amount of practice to master, and all the materials that Vedantu provides make the work easy. Download the notes and plenty of questions to practise, and join our Vedantu pro class for maths to learn the experts with 3-D visuals.

3. Is it necessary to revise all chapters of Class 9 Maths?

Yes, it is required to revise all the chapters of Class 9 Maths to score good grades in your examination. Revision helps you retain the concepts for a long time, and these things help you later in higher classes because everything you learn in maths is interconnected. Boost your revision with Vedantu's revision notes that are well structured and provide you with a clear image of the concepts. All these notes are available for free to download.

4. How to use notes offered by Vedantu for class 9 ICSE Chapter 9 of Maths?

Experts of maths have crafted the Class 9 notes of Maths Chapter 9 of the ISCE; to offer a crispy and indulging medium to recapture the lessons students already have learnt. Chapter 9 covers the triangle and the congruence conditions of the triangle; this chapter teaches you about different corollaries to prove that Vedantu has captured all these topics into a few pages. You can use it during your exam time or while solving the sums to memorise the properties faster.

5. Does Vedantu provide notes of other subjects of Class 9?

Yes, Vedantu does provide you with other subjects notes of ISCE Class 9 notes. Revision Notes are necessary to maintain if you cannot make it by yourself, do not worry Vedantu provides you with everything that is required to ace your exams. At least have notes for core subjects like Science and Mathematics. These subjects are quite lengthy, so it takes much time to go through all the pages of a chapter. You should read notes and revise them frequently.