Which theorem does it offer proof for?
prove zjnm
nmi

according to the given information in the image. jk hi white zjnm and lnk are vertical angles. zjnm and lnk are congruent by the vertical angles theorem because lnk and nmi are
corresponding angles, they are congruent according to the corresponding angles theorem finally, zjnm is congruent to nmi by the
operty of equality

alternate interior angles theorem
corresponding angles theorem
vertical angles theorem
same-side interior angles theorem