Download CBSE Class 9 Mathematics Triangles Notes in PDF format. All Revision notes for Class 9 Mathematics have been designed as per the latest syllabus and updated chapters given in your textbook for Mathematics in Class 9. Our teachers have designed these concept notes for the benefit of Class 9 students. You should use these chapter wise notes for revision on daily basis. These study notes can also be used for learning each chapter and its important and difficult topics or revision just before your exams to help you get better scores in upcoming examinations, You can also use Printable notes for Class 9 Mathematics for faster revision of difficult topics and get higher rank. After reading these notes also refer to MCQ questions for Class 9 Mathematics given on studiestoday
Revision Notes for Class 9 Mathematics Chapter 7 Triangles
Class 9 Mathematics students should refer to the following concepts and notes for Chapter 7 Triangles in Class 9. These exam notes for Class 9 Mathematics will be very useful for upcoming class tests and examinations and help you to score good marks
Chapter 7 Triangles Notes Class 9 Mathematics
IX
Mathematics
Chapter 7: Triangles
Chapter Notes
Top Definitions
1. Two figures are congruent, if they are of the same shape and of the same size.
2. Two figures are similar, if they are of the same shape but of different size.
3. SAS congruence rule: Two triangles are congruent if two sides and the included angle of one triangle are equal to the two sides and the included angle of the other triangle.
4. ASA congruence rule: Two triangles are congruent if two angles and the included side of one triangle are equal to two angles and the included side of other triangle.
5. AAS congruence rule: Two triangles are congruent if any two pairs of angles and one pair of corresponding sides are equal.
6. SSS congruent rule: If three sides of one triangle are equal to the three sides of another triangle, then the two triangles are congruent.
7. RHS congruence rule: If in two right triangles the hypotenuse and one side of one triangle are equal to the hypotenuse and one side of the other triangle, then the two triangles are congruent.
8. A triangle in which two sides are equal is called an isosceles triangle.
Top Concepts
1. If two triangles ABC and PQR are congruent under the corresponding A ↔ P, B ↔Q and C ↔ R, then symbolically, it is expressed as Δ ABC @ Δ PQR.
2. Two circles of the same radii are congruent.
3. Two squares of the same sides are congruent.
4. Each angle of an equilateral triangle is of 60°.
5. In congruent triangles corresponding parts are equal and we write this as ‘CPCT’ for corresponding parts of congruent triangles.
6. SAS congruence rule holds but not ASS or SSA rule.
7. Angles opposite to equal sides of an isosceles triangle are equal.
8. The sides opposite to equal angles of a triangle are equal.
9. RHS stands for Right Angle – Hypotenuse – Side.
10. If two sides of a triangle are unequal, then the greater angle is opposite to the greater side.
11. If two angles of a triangle are unequal, the greater side is opposite to the greater angle.
12. The sum of any two sides of a triangle is greater than the third side.
13. The difference between any two sides of a triangle is less than the third side.
14. If the sum of two adjacent angles is 180°, then the non – common arms of the angles form a line.
Please click the link below to download pdf file for CBSE Class 9 Concepts for Triangles.
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CBSE Class 9 Mathematics Chapter 7 Triangles Notes
We hope you liked the above notes for topic Chapter 7 Triangles which has been designed as per the latest syllabus for Class 9 Mathematics released by CBSE. Students of Class 9 should download and practice the above notes for Class 9 Mathematics regularly. All revision notes have been designed for Mathematics by referring to the most important topics which the students should learn to get better marks in examinations. Studiestoday is the best website for Class 9 students to download all latest study material.
Notes for Mathematics CBSE Class 9 Chapter 7 Triangles
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Chapter 7 Triangles Notes for Mathematics CBSE Class 9
All revision class notes given above for Class 9 Mathematics have been developed as per the latest curriculum and books issued for the current academic year. The students of Class 9 can rest assured that the best teachers have designed the notes of Mathematics so that you are able to revise the entire syllabus if you download and read them carefully. We have also provided a lot of MCQ questions for Class 9 Mathematics in the notes so that you can learn the concepts and also solve questions relating to the topics. All study material for Class 9 Mathematics students have been given on studiestoday.
Chapter 7 Triangles CBSE Class 9 Mathematics Notes
Regular notes reading helps to build a more comprehensive understanding of Chapter 7 Triangles concepts. notes play a crucial role in understanding Chapter 7 Triangles in CBSE Class 9. Students can download all the notes, worksheets, assignments, and practice papers of the same chapter in Class 9 Mathematics in Pdf format. You can print them or read them online on your computer or mobile.
Notes for CBSE Mathematics Class 9 Chapter 7 Triangles
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