1. Chapter 6 Class 7 Triangle and its Properties
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  3. Ex 6.5
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Ex 6.5, 2 - Chapter 6 Class 7 Triangle and its Properties

Last updated at Dec. 16, 2024 by Teachoo

Transcript

Ex 6.5, 2 ABC is a triangle, right-angled at C. If AB = 25 cm and AC = 7 cm, find BC.In βˆ†ABC, right angled at C, AB = 24 cm, AC = 7 cm, BC = ? By Pythagoras theorem, 〖𝐴𝐡〗^2 = 〖𝐴𝐢〗^2 + 〖𝐡𝐢〗^2 γ€–(25)γ€—^2 = γ€–(7)γ€—^2 + 〖𝐡𝐢〗^2 625 = 49 + 〖𝐡𝐢〗^2 625 βˆ’ 49 = 〖𝐡𝐢〗^2 576 = 〖𝐡𝐢〗^2 γ€–(24)γ€—^2 = 〖𝐡𝐢〗^2 Cancelling squares 24 = 𝐡𝐢 𝐡𝐢 = 24 ∴ 𝑩π‘ͺ = 24 cm Rough 576 = 2 Γ— 2 Γ— 2 Γ— 2 Γ— 2 Γ— 2 Γ— 3 Γ— 3 = (2 Γ— 2 Γ— 2 Γ— 3) Γ— (2 Γ— 2 Γ— 2 Γ— 3) = 24 Γ— 24 = 242
  1. Chapter 6 Class 7 Triangle and its Properties
  2. Serial order wise

    3. Ex 6.5

    Examples →
Examples →
Chapter 6 Class 7 Triangle and its Properties
Serial order wise

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo