Two parallel lines are intersected by a third line so that angles 1 and 5 are congruent. 2 parallel horizontal lines are intersected by a third line. on the first horizontal line where the third line intersects, 4 angles are created. labeled clockwise, from uppercase left, the angles are 1, 2, 4, 3. on the second horizontal line, where the third line intersects, 4 angles are created. labeled clockwise, from uppercase left, the angles are 5, 6, blank, blank. which statement is true about angles 3 and 5? they are acute. they are congruent. they are complementary. they are supplementary