... symmetry of a two-dimensional figure is an isometry of the plane that fixes the figure [HE03]. There are two types of two-dimensional symmetry, rotational symmetry and reflectional ... On the other hand, We now consider another example. 1TEAM LinG - Live, Informative, Non-cost and Genuine !2 Planar Graph Drawing STATION STATION STATION STATION STATION ’’ J STATION ... Fig. 1.6(a). Orthogonal drawings have attracted much attention due to their numerous applications in circuit layouts, database diagrams, entity-relationship diagrams, etc. Many results have been...