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Chapter 6 Class 9 Lines and Angles
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Ex 6.3, 4 - In figure, if lines PQ & RS intersect at point T - Triangle - Problems
Ex 6.3, 4 - Chapter 6 Class 9 Lines and Angles - Part 2

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Ex 6.3, 4 In the given figure, if lines PQ and RS intersect at point T, such that PRT = 40 , RPT = 95 and TSQ = 75 , find SQT. In PRT By angle sum property of triangle PRT + RPT + PTR = 180 90 + 45 + PTR = 180 135 + PTR = 180 PTR = 180 135 PTR = 45 Also, STQ = PTR STQ = 45 In SQT By angle sum property of triangle SQT + STQ + TSQ = 180 SQT + 75 + 45 = 180 SQT + 120 = 180 SQT = 180 120 SQT = 60

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