If `l , m,n` are three lines such that `l |\| m` and `n_|_l ,` prove that `n_|_mdot`

Explanation

To prove that line \( n \) is perpendicular to line \( m \) given that line \( l \) is parallel to line \( m \) and line \( n \) is perpendicular to line \( l \), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Information**:
- We have three lines: \( l \), \( m \), and \( n \).
- It is given that \( l \parallel m \) (lines \( l \) and \( m \) are parallel).
- It is also given that \( n \perp l \) (line \( n \) is perpendicular to line \( l \)).
...