Q10 of 53 Page 122

Show that the line joining the points A(4, 8) and B(5, 5) is parallel to the linejoining the points C(2,4) and D(1,7).

Slope of a line between two points (a,b) and (c,d) is



Slope of AB =


Slope of AC =


As slopes are equal, the two lines are parallel.


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In the following examples, can the segment joining the given points form atriangle? If triangle is formed, state the type of the triangle considering sides ofthe triangle.

(1) L(6,4), M(-5,-3) , N(-6,8)


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(3)

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