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

Last updated at May 29, 2023 by

Ex 10.1, 3 - Find distance between P(x1, y1), Q(x2, y2) when

 

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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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