Answer:
The given line l and m are parallel.
The proof is given below
Explanation:
It is given that two lines l and m are parallel.m<1= m<2
To prove l parallel m
1). m<1 = m<2 - given
2). m<1 = m<3 - Vertical angles are equal
3).m<2 = m<3 - Substitution
4). l ║m - If corresponding angles are equal then the lines
are parallel.
Hence the proof