NCERT Solutions For Class 7 Maths Chapter 7 Congruence Of Triangles in Hindi - 2025-26
FAQs on NCERT Solutions For Class 7 Maths Chapter 7 Congruence Of Triangles in Hindi - 2025-26
1. Where can I find correct and step-by-step NCERT Solutions for Class 7 Maths Chapter 7, Congruence of Triangles?
You can find comprehensive and expert-verified NCERT Solutions for Class 7 Maths Chapter 7 on Vedantu. These solutions provide detailed, step-by-step methods for every question in the textbook exercises, strictly following the 2025-26 CBSE syllabus. They are designed to help you understand the correct approach to solving problems related to congruence.
2. Which congruence criteria are explained in the NCERT Solutions for Class 7 Maths Chapter 7?
The NCERT Solutions for Class 7 Maths Chapter 7 provide detailed explanations and solved examples for all four essential congruence criteria as per the NCERT curriculum:
- SSS (Side-Side-Side) Congruence criterion
- SAS (Side-Angle-Side) Congruence criterion
- ASA (Angle-Side-Angle) Congruence criterion
- RHS (Right angle-Hypotenuse-Side) Congruence criterion for right-angled triangles
3. How do the NCERT Solutions for Chapter 7 help in preparing for Class 7 Maths exams?
These solutions are crucial for exam preparation as they demonstrate the exact methodology required to write answers and score full marks. By following the step-by-step proofs for congruence, students learn how to logically present their arguments, state the correct reasons for each step, and avoid common errors, ensuring they meet the evaluation criteria set by CBSE.
4. Why is it important to follow the step-by-step method shown in the NCERT Solutions when proving triangle congruence?
Following a step-by-step method is critical because it ensures logical consistency and clarity in a proof. Each step, such as identifying equal sides or angles, must be justified with a valid reason (e.g., Given, Common Side, Vertically Opposite Angles). The NCERT Solutions model this systematic approach, which is exactly what examiners look for to award full marks and prevents deductions for incomplete or unstructured answers.
5. How do the NCERT Solutions clarify the difference between the SAS and ASA congruence rules?
The NCERT Solutions clarify this by solving specific problems that highlight the key difference. For the SAS (Side-Angle-Side) rule, they show that the angle must be the 'included angle' located between the two corresponding equal sides. For the ASA (Angle-Side-Angle) rule, they demonstrate that the side must be the 'included side' between the two corresponding equal angles. The solved examples make these conditions easy to identify and apply correctly.
6. Is 'AAA' (Angle-Angle-Angle) a valid criterion for congruence? Why do the NCERT Solutions not use it?
No, 'AAA' (Angle-Angle-Angle) is not a criterion for the congruence of triangles, and therefore, the NCERT Solutions do not use it for proofs. While two triangles with identical angles will have the same shape, they can have different sizes. 'AAA' is a criterion for similarity, not congruence. The solutions for Chapter 7 only focus on criteria (SSS, SAS, ASA, RHS) that guarantee two triangles are identical in both shape and size.
7. What is the correct way to apply the RHS congruence rule as shown in the NCERT Solutions?
The NCERT Solutions demonstrate that to apply the RHS (Right angle-Hypotenuse-Side) rule, three specific conditions must be met:
- Both triangles must be right-angled triangles.
- The hypotenuses of both triangles must be equal.
- One pair of corresponding sides (other than the hypotenuse) must be equal.
The solutions provide solved problems that guide you on how to verify these three conditions before concluding that the triangles are congruent.
8. After proving two triangles are congruent, what does 'CPCTC' mean and how do the NCERT solutions use it?
CPCTC stands for 'Corresponding Parts of Congruent Triangles are Congruent'. The NCERT Solutions use this principle after a congruence (like ΔABC ≅ ΔPQR) has been established using a rule like SSS or SAS. It is used as the reason to state that any remaining corresponding parts (sides or angles) are also equal without needing a separate proof. This is a crucial final step in many problems.

















