Problem
2 Which angles are vertical angles? $\angle L K H$ and $\angle J K H$ $\overleftrightarrow{G I}$ and $\overleftrightarrow{J L}$ are parallel lines. $\angle L K H$ and $\angle G H K$ $\angle L K H$ and $\angle I H F$ $\angle L K H$ and $\angle J K M$
Solution
Step 1 ：Identify the angles formed by intersecting lines using the given information about parallel lines: \(\overleftrightarrow{G I}\) and \(\overleftrightarrow{J L}\)
Step 2 ：Find the vertical angles, which are opposite to each other when two lines intersect
Step 3 ：\(\boxed{\angle L K H \text{ and } \angle J K H \text{ are vertical angles}}\)
