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Chapter 6 Class 9 Lines and Angles
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Ex 6.1, 2 - In given figure, lines XY & MN intersect at O - Ex 6.1

Ex 6.1,2 - Chapter 6 Class 9 Lines and Angles - Part 2

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Ex 6.1, 2 In the given figure, lines XY and MN intersect at O. If ∠POY = 90° and a:b = 2 : 3, find c. Given a: b = 2 : 3 Let a = 2x & b = 3x, where x is some number Now, ∠ POX +∠ POY = 180° a + b + 90° = 180° a + b = 180° – 90° 2x + 3x = 90° 5x = 90° x = 90"°" /5 a = 2x b = 3x We need to find c, Since MN is a line, we can use linear pair ∠MOX + ∠XON = 180° b + c = 180° 54° + c = 180° c = 180° – 54° c = 126°

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.