$L$ is the point on $\overleftrightarrow{MN}$ which is equally distant from lines $\overleftrightarrow{JN}$ and $\overleftrightarrow{MK}$.
$\overleftrightarrow{JN}$ and $\overleftrightarrow{MK}$ are parallel lines.
**Perform a rotation that proves alternate interior angles are always equal and select the option which best explains the proof.**
[[☃ radio 1]]
[[☃ transformer 1]]