that in… Show more Symmetries in Abstract Algebra Problem statement: Let and be lines through the origin in that intersect in an angle , and let be a reflection about . Prove that and generate a dihedral group . So, i’m starting with: Let , with and for some . Clearly,. But I am unsure how to continue from here, and how to show that . I know that and is generated by and . We recently started learning about symmetries and some of the concepts are still not completely clear to me. • Show less