10. Heron's Formula
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Description:
Strengthen your understanding of Chapter 12: Heron’s Formula with this well-structured NCERT Solutions PDF, aligned with the latest CBSE Class 9 Mathematics syllabus (2025–26). It provides accurate, step-by-step answers to all textbook problems, helping students master calculating the area of triangles and quadrilaterals using Heron’s Formula with ease.
Ideal for Class 9 CBSE students, teachers, and parents for revision, homework help, and concept reinforcement.
What’s Inside This PDF?
✅ Complete solutions to all NCERT in-text and end-of-chapter questions
✅ Step-by-step application of Heron’s Formula with examples
✅ Includes problems on finding the area of triangles and quadrilaterals
✅ Answers prepared as per CBSE’s latest marking scheme
✅ Based entirely on the official NCERT Class 9 Maths Chapter 12 textbook
Why Use This NCERT Solution?
✅ Clarity-Focused: Simplifies the formula and its application in problems
✅ Exam-Ready Language: Solutions framed to meet CBSE board standards
✅ Time-Saving: Perfect for last-minute revision and quick homework reference
✅ CBSE 2025–26 Compliant: Fully updated and syllabus-accurate
Frequently Asked Questions (FAQs)
Area = √[ s(s − a)(s − b)(s − c) ], where s = (a + b + c)/2.
s = (7 + 8 + 9)/2 = 12 cm.
Area = √[12 × (12 − 7) × (12 − 8) × (12 − 9)] = √720 = 12√5 ≈ 26.83 cm².
Yes, by dividing the quadrilateral into two triangles and applying the formula to each.
The semi-perimeter of the triangle.
