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

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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 and Computer Science at Teachoo