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Nitya Singh
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Asked: 2020-11-03T09:56:38+00:00 In:

The angles of quadrilateral are in the ratio 3 : 5 : 9 : 13. Find all the angles of the quadrilateral.

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NCERT Solutions for Class 9 Maths Chapter 8
Important NCERT Questions
Quadrilaterals
NCERT Books for Session 2022-2023
CBSE Board and UP Board Others state Board
EXERCISE 8.1
Page No:146
Questions No: 1

2020-2021cbsechapter 8class 9mathematicsncertquadrilaterals
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    2 Answers

    1. Get Hindi Medium and English Medium NCERT Solution for Class 9 Maths to download.
      Please follow the link to visit website for first and second term exams solutions.
      https://www.tiwariacademy.com/ncert-solutions/class-9/maths/chapter-8/

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    2. Best Answer

      Let the first angle = 3x
      Therefore, the cecond angle = 5x,
      Third angle = 9x and
      Fourth angle = 13x
      Sum of all angles of a Quadrilateral is 360°. Therefore, 3x + 5x + 9x + 13x = 360°
      ⇒ 30x = 360° ⇒ x = 360°/30 = 12°
      Hence, the first angle = 3 × 12° = 36°,
      The second angle = 5 × 12° = 60°,
      Third angle = 9 × 12° = 108°
      The forth angle = 13 × 12 = 156°

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