The points (0, 83 ), (1,3) and (82,30)

JEE Main 2015 Mathematics question

The points , and

(1)form an obtuse angled triangle
(2)form an acute angled triangle
(3)lie on a straight lineCorrect
(4)form a right angled triangle

Answer: (3)

Solution

Compare the slopes of the segments. From to the slope is . From to the slope is . The two slopes are equal and the segments share the point , so all three

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Question ID VK-115292