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

  1. Chapter 10 Class 11 Straight Lines
  2. Serial order wise
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Ex10.1, 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 = √("(x2 " − " x1)2 " + "(y2 " − " y1)2" ) = √("(x2 " − " x2)2 " + "(y2 " − " y1)2" ) = √("(y2 " − " y1)2" + 0) = √("(y2 " − " y1)2" ) = ± (y2 – y1) = |"y2" −" y1" | Ex10.1, 3 Find the distance between P (x1, y1) and Q (x2, y2) when: (ii) PQ is parallel to the x-axis. Since PQ is parallel to x-axis y1 = y2. Distance PQ = √("(x2 " − " x1)2 " + "(y2 " − " y1)2" ) = √("(x2 " − " x1)2 " + "(y1 " − " y1)2" ) = √("(x2 " − " x1)2" + 0) = √("(x2 " − " x1)2" ) = ± (x2 – x1) = |"x2" −" x1" |

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