In this figure, lines a and b intersect a transversal, c.

What is the relationship between ∠4 and ∠6?


Horizontal parallel lines a and b are intersected by diagonal transversal line c which rises from left to right. The four angles formed where line c intersects line A are labeled 1, 7, 3, and 4 starting with the top left angle and going clockwise. The four angles formed where line c intersects line A are labeled 2, 6, 5, and 8 starting with the top left angle and going clockwise.