You can get a list of all flights arriving at a given airport by selecting the By Airport tab. Or you can see a list of all flights on a given route by selecting By Route. You can usually determine which flight you should track from the route and timing information.
A square is a regular polygon. It has four lines of symmetry and four sides. A regular pentagon has 5 sides and 5 lines of symmetry. The number of lines of symmetry in a regular polygon is equal to the number of sides.
Since there are an infinite number of lines through the center, the circle has an infinite number of lines of symmetry. When the circle is folded over a line of symmetry, the parts of the circle on each side of the line match up. This means that the parts of the circle on each side of the line must have the same area. So a line of symmetry divides the circle into two parts with equal area.