Straight Line and Pair of Straight Lines 3 Question 4

5. The points 0,83,(1,3) and (82,30) are vertices of

(a) an obtuse angled triangle

(b) an acute angled triangle

(c) a right angled triangle

(d) None of the above

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Answer:

Correct Answer: 5. (d)

Solution:

  1. Since, vertices of a triangle are (0,8/3),(1,3) and (82,30)

Now, 12|08/31 131 82301|

=1283(182)+1(30246)=12[216216]=0

Points are collinear.



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