Ex 9.1, 3 (i) - Chapter 9 Class 11 Straight Lines

Last updated at April 16, 2024 by

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Ex 9.1, 3 Find the distance between P (x1, y1) and Q (x2, y2) when: (i) PQ is parallel to the y-axis. Since PQ is parallel to y-axis x1 = x2. Distance PQ = √("(" 𝑥_2−𝑥_1 ")2 " +"(" 𝑦_2−𝑦_1 ")2" ) = √("(" 𝑥_2−𝑥_2 ")2 " +"(" 𝑦_2−𝑦_1 "2" ) = √((𝑦_2−𝑦_1 "2" )+0) = √("(" 𝑦_2−𝑦_1 ")2" ) = ± (𝑦_2−𝑦_1) = |"y2" −"y1" |

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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.