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Similar figures, the Basic Proportionality Theorem, and the AA, SSS and SAS tests for triangle similarity.
Triangles
Step-by-step solutions to all 16 questions of NCERT Class 10 Exercise 6.3, using the AA, SSS and SAS criteria on medians, altitudes, bisectors, a trapezium, a parallelogram and a shadow problem.
Triangles
The AA, SSS and SAS similarity criteria for triangles with proofs from the Basic Proportionality Theorem, the RHS note, and worked examples including the classic lamp-post shadow problem.
Triangles
Step-by-step solutions to every question of NCERT Class 10 Exercise 6.2, using the Basic Proportionality Theorem and its converse to find lengths, test for parallel lines and prove trapezium results.
Triangles
The Basic Proportionality Theorem (Thales) and its converse for Class 10: statement, full area proof, the whole-side form, and worked examples on lengths, parallel tests, trapeziums and isosceles triangles.
Triangles
Complete NCERT Class 10 Exercise 6.1 solutions: the fill-in-the-blanks on similar and congruent figures, checked examples of similar and non-similar pairs, and the square and rhombus question.
Triangles
What similar figures are, how they differ from congruent ones, and the two-part test of equal angles and proportional sides, with scale factors, worked examples on rectangles, photos and maps, and practice questions.