please po pahelp dito

Just refer to the figure drawn in the attached picture.
From vertex [tex]I,[/tex] draw a segment to a point [tex] N [/tex] on side [tex] \overline{BG} [/tex] which bisects [tex]\angle BIG[/tex] into two congruent angles [tex]\angle BIN[/tex] and [tex]\angle GIN.[/tex]