🎯Class 7 Maths Chapter 11 Triangles and Their Properties Full Chapter Explanation | NCERT Solutions

Welcome to *Study21a* – your trusted channel for **Class 7 Maths complete NCERT solutions, explanations, and concept clarity**.
In today’s video, we are covering *Class 7 Mathematics Chapter 11 – “Triangles and Their Properties”* in a very simple and detailed way. This lesson is extremely important for your **CBSE Class 7 Maths exam preparation**, class tests, school exams, and Olympiad foundation.

📘 *Chapter Name:* Triangles and Their Properties
🏫 *Class:* 7 (Mathematics)
📚 *Board:* CBSE / NCERT / All State Boards following NCERT pattern
🧮 *Topic Covered:* Properties of Triangles, Medians of a Triangle, Altitudes, Exterior Angle Property, Angle Sum Property, Types of Triangles and more.

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🔹 *In this video, you will learn:*

1. What is a triangle? Basic definition and examples.
2. Types of triangles on the basis of sides and angles.
3. What is a median of a triangle and how to draw it?
4. Altitude of a triangle – meaning, construction, and properties.
5. The *angle sum property* of a triangle and proof with easy steps.

📖 *NCERT Class 7 Maths Chapter 11 – Triangles and Their Properties: Topics Explained*

This chapter gives students a deep understanding of triangles – one of the most important shapes in geometry. You will learn about the **different parts of a triangle**, such as sides, vertices, and angles, and how to classify them.

We also explore:

*Medians and Altitudes of Triangles* – how to identify and draw them using a compass and ruler.
*Angle Sum Property* – the sum of angles in a triangle is always 180°.
*Exterior Angle Property* – an exterior angle is equal to the sum of two interior opposite angles.

Every topic is explained clearly with a visual approach and practical examples from daily life. This helps students to understand geometry concepts with clarity and interest.

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💡 *Why this video is important for students*

Full NCERT Class 7 Maths Chapter 11 Explanation.
Step-by-step solutions for all exercise questions.
Simple language and board work method just like in classroom teaching.
Perfect for Class Tests, Unit Tests, Half Yearly & Final Exams.
Builds strong foundation for Class 8, 9 & 10 Geometry chapters.
Helps in Olympiad and NTSE level conceptual understanding.

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📘 *Exercises Covered in This Video*

✅ Exercise 11.1 – Types of Triangles and Basic Concepts
✅ Exercise 11.2 – Medians and Altitudes of a Triangle
✅ Exercise 11.3 – Exterior Angle Property


🎓 *Key Formulas You Will Learn*

Sum of angles of a triangle = 180°
Exterior angle = Sum of two interior opposite angles
Pythagoras Theorem → In right triangle, (a^2 + b^2 = c^2)
Median bisects the opposite side
In isosceles triangle, two sides and two angles are equal

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🧠 *Concepts Made Easy*

At **Study21a**, we believe in making math fun and conceptual. Our goal is to make you understand every topic so that you never forget it. The teacher explains every step clearly on the board so you can follow easily from home.

This video follows the latest CBSE pattern and includes important questions from the exam point of view.

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📺 *Watch Next on Our Channel*

🔹 Class 7 Maths Chapter 10 – Practical Geometry
🔹 Class 7 Maths Chapter 12 – Congruence of Triangles
🔹 Class 7 Maths Chapter 6 – The Triangle and its Properties (Revision Part 1)
🔹 Class 7 Maths Chapter 15 – Perimeter and Area
🔹 Class 6 to 10 Maths Full Chapters in Hindi and English

📂 *Playlists:* Visit the Class 7 Maths Playlist here: [Study21a Class 7 Maths Playlist]

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