Triangles Class 10 Maths Full Chapter One Shot 🎯 | Chapter 6 CBSE Board 2026

This chapter explores the geometric conditions that make two shapes "similar" rather than identical. While congruent triangles are the same size and shape, similar triangles have the same shape but different sizes. ​The core of the chapter is built around understanding how ratios and proportions govern geometric figures. You will master the Basic Proportionality Theorem (Thales Theorem), learn the specific criteria (AAA, SAS, SSS) for triangle similarity, and understand the relationship between the areas of similar triangles and their side lengths. The chapter culminates in the proof and application of the Pythagoras Theorem, providing a foundation for trigonometry and coordinate geometry. ​Key Learning Pillars ​Similarity of Figures: Understanding that all congruent figures are similar, but not all similar figures are congruent. ​Basic Proportionality Theorem (BPT): If a line is drawn parallel to one side of a triangle, it divides the other two sides in the same ratio. ​Criteria for Similarity: Mastery of Angle-Angle-Angle (AAA), Side-Side-Side (SSS), and Side-Angle-Side (SAS) rules. ​Pythagoras Theorem: Proving a^2 + b^2 = c^2 using the concept of similarity. ​#Class10Maths #Geometry #Triangles #CBSE2026 #SimilarTriangles #BPT #ThalesTheorem #PythagorasTheorem #MathsNotes #Education #BoardExams