Exercise 7.4 — Triangle Inequalities

Exercise 7.4 — Triangle Inequalities (Class 9)

Exercise 7.4 — Triangle Inequalities is a practice exercise in Triangles for Class 9 Mathematics. Inequalities in a triangle. This exercise develops your skills in congruence criteria and triangle inequality — both of which are tested directly in CBSE, Telangana and Andhra Pradesh board examinations.

How to Approach Exercise 7.4

• Before writing, re-read each problem and identify: what is given, what is asked, and which formula or method applies.
• This exercise tests congruence criteria — master the underlying concept from the introduction lesson before attempting.
• Show every step of your working in board exams — step marks are awarded independently of the final answer.
• After solving each problem, verify your answer by substituting back or checking it against all given conditions.
• Note the specific formula or identity used in each problem — these same tools appear in later exercises and in Class 9 board papers.

Marks and Exam Pattern for Exercise 7.4

Problems from Exercise 7.4 in Triangles appear regularly in Class 9 board examinations across CBSE, Telangana and Andhra Pradesh. The questions test triangle inequality and angle sum property. Work through every problem in this exercise before your exam — the examiner draws from these standard problem types when setting the board paper.

How to Use This Lesson

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