## Elementary Geometry for College Students (5th Edition)

$SAS \sim$
We are given that one set of corresponding angles is congruent. We are also given that the corresponding sides on the 'left' side of the angles are proportional AND the corresponding sides on the 'right' side of the angles are equally proportional. Since the congruent angles are INBETWEEN the two sets of proportional corresponding sides, the two triangles are congruent by $SAS \sim$.