Question 4 (b) - Ex 3.1 - Chapter 3 Class 8 Understanding Quadrilaterals

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Ex 3.1, 6 - Chapter 3 Class 8 Understanding Quadrilaterals - Part 2

Ex 3.1, 6 - Chapter 3 Class 8 Understanding Quadrilaterals - Part 3

Transcript

Ex 3.1, 6 Find the angle measure x in the following figures (b) Given ∠BAO = 90° ∠B = x ∠C = 70° ∠D = 60° Since OAD is a line ∠ BAO + ∠1 = 180° 90° + ∠1 = 180° ∠ 1 = 180° − 90° ∠1 = 90° In quadrilateral ABCD, Sum of all angles of a quadrilateral = 360° ∠A + ∠B + ∠C + ∠D = 360° 90° + x + 70° + 60°= 360° x + 220° = 360° x = 360° − 220 x = 140°

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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, Social Science, Physics, Chemistry, Computer Science at Teachoo.