Class 9 Maths | Chapter 7 – Triangles | Exercise 7.3 Question 4
Автор: Math Station- 9th & 10th
Загружено: 2026-03-02
Просмотров: 5
Описание:
In this video, JP Sir explains Exercise 7.3 Question 4 from Chapter 7 – Triangles (Class 9 NCERT Maths) with a neat diagram and step-by-step proof. You’ll learn how equal altitudes in a triangle can be used with the RHS congruence rule to prove that the triangle is isosceles.
📘 What you will learn in this video:
🔹 Understanding altitudes BE and CF in triangle ABC
🔹 Identifying the right-angled triangles formed by altitudes
🔹 Applying the RHS (Right angle–Hypotenuse–Side) congruence rule
🔹 Proving the congruence of two right triangles
🔹 Concluding that AB = AC, so ∆ABC is isosceles
🔹 Writing clean, logical proof-based answers
🎯 Why this question is important:
🔹 Shows a smart use of altitudes in congruence proofs
🔹 Strengthens understanding of the RHS congruence criterion
🔹 Important for exam-oriented geometry questions
🔹 Improves confidence in linking constructions to results
👉 Watch the full explanation to see how equal altitudes lead to an isosceles triangle.
👍 Like, Share & Subscribe to Math Station for more Class 9 Maths videos by JP Sir.
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#NCERTClass9Maths
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