ANSWER
[tex] \angle1 \cong \angle3[/tex]
[tex] \angle1 \cong \angle8[/tex]
[tex] \angle1 \cong \angle6[/tex]
EXPLANATION
Since line l is parallel to line m,
[tex] \angle1 \cong \angle3[/tex]
because the two angles are vertically opposite angles.
[tex] \angle1 \cong \angle8[/tex]
because the two angles are corresponding angles.
[tex] \angle1 \cong \angle6[/tex]
because the two angles are alternate exterior angles.
