Identify the pairs of parallel lines.

k and l

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m and n

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l and j

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j and k

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Solution

The correct options are
B m and n
C l and j
Parallel lines are the lines that do not intersect at any point.
It means the distance between the lines should be constant.
In the figure, the distance remains same between m and n , l and j.
So, l is parallel to j and m is parallel to n.

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Question 145 (i)

In the given figure, it is given that LM = ON and NL = MO

State the three pairs of equal parts in the $Δ N O M$ and $Δ M L N$

2 l + 2 m - n = 0

m n + n l + l m = 0

2 l + 2 m - n = 0

m n + n l + l m = 0,

Show that the straight lines whose direction cosines are given by 2l+2m-n=0 and mn+nl+lm=0 are at right angles.

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