![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
Given that ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e5e479bfeedb1fc835d777e216ff7acc.png\")
.
If the two lines in a plane are cut by a transversal so that a pair of alternate interior angles is congruent, then the lines are parallel.
\Since ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d56052418734771e3d6b944adc8ed475.png\")
are the alternate interior angles and they are congruent.
Congruent alternate interior angles indicates parallel lines. So, ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ca36a6a086ba0c5cab9102b8e64b7388.png\")
.