Can you guys help me? :)?

Question

Find the measure of the angle between two intersecting lines if successive reflections in these lines creates a rotation of 80 degrees.

Answer 1

20 degrees i think

Answer 2

40 degrees, boy you complicate matters

Answer 3

http://tutorvista.com/mvt/brand.php?a=a&...

Answer 4

no s**y b****

Answer 5

i could but i don't feel like it.