NCERT Solutions for Class 7 Mathematics Chapter 6
Important NCERT Questions
Class vii Math Chapter 6 The Triangles and Its Properties Exercise 6.5
NCERT Books for Session 2022-2023
CBSE Board
Questions No: 2
ABC is a triangle, right angled at C. If AB = 25 cm and AC = 7 cm, find BC.
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Given: AB = 25 cm, AC = 7 cm
Let BC be x cm.
In right angled triangle ACB,
(Hypotenuse)² = (Base)² + (Perpendicular)² [By Pythagoras theorem]
⇒ (AB)² = (AC)² + (BC)²
⇒ (25)² = (7)²
⇒ 625 = 49 + x²
⇒ x² = 625 – 49 = 576
⇒ x² = √576 = 24 cm
Thus, the length of BC is 24 cm.
Class 7 Maths Chapter 6 Exercise 6.5
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https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-6/