Chapter 6 Class 10 Triangles

Master Chapter 6 Class 10 Triangles with comprehensive NCERT Solutions, Practice Questions, MCQs, Sample Papers, Case Based Questions, and Video lessons.

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Serial order wise

Ex 6.1
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Ex 6.2
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Ex 6.3
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Examples
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Theorems
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Case Based Questions (MCQ)
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NCERT Exemplar - MCQ
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Ratio of Area of Similar Triangles
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Pythagoras Theorem and it's important questions
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Important questions of Triangle (in Geometry)
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Concept wise

Similarity Defination
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Theorem 6.1
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Theorem 6.2
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SSS Similarity
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AA Similarity
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SAS Similarity
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Given similar, find angles or sides
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Area of similar triangles
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Pythagoras Theoram - Finding value
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Pythagoras Theoram - Proving
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Theorem 6.7
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Why Learn This With Teachoo?

Updated for new NCERT 2026-2026 Edition.

Get NCERT Solutions of Chapter 6 Class 10 Triangles free at teachoo. Solutions to all NCERT Exercise Questions, Examples, Theorems, Optional Exercises are available with Videos of each and every question.

 

We have studied Congruency of Triangles in Class 9.

In this chapter, we will learn

  • What are Similar figures
  • Difference between Congruency and Similarity
  • Basic Proportionality Theorem (BPT) - with Proof (Theorem 6.1)
  • Inverse of Basic Proportionality Theorem - with Proof (Theorem 6.2)
  • AAA (Angle Angle Angle) Similarity i.e. all 3 angles equal, with Proof (Theorem 6.3)
  • Is AA and AAA the same?
  • SSS (Side Side Side) Similarity i.e. all 3 sides in proportion, with Proof (Theorem 6.4)
  • SAS (Side Angle Side) Similarity, i.e. 2 sides in proportion, and 1 angle between them equal - with Proof (Theorem 6.5)
  • Ratios of areas of two similar triangles is equal to square of ratio of their corresponding sides  - with Proof (Theorem 6.6)
  • Theorem 6.7 - If a perpendicular is drawn from the vertex of the right angle of a right triangle to the hypotenuse then triangles on both sides of the perpendicular are similar to the whole triangle and to each other
  • Pythagoras Theorem Proof (Theorem 6.8)

 

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