In the given options, the correct altitude of a triangle is gi as it is a line segment drawn from the vertex g perpendicular to the opposite side ij of triangle gji.
In the given options, the altitude of a triangle is a line segment drawn from a vertex perpendicular to the opposite side. An altitude helps in determining the height of a triangle and is always inside the triangle.
Therefore, looking at the options:
ji is an altitude of hji: This option is incorrect as the altitude should be drawn from a vertex to the opposite side. Here, ji is one of the sides of the triangle, not the altitude.
gi is an altitude of gji: This option is correct. gi is a line segment drawn from the vertex g perpendicular to the opposite side ij.
jh is an altitude of gji: This option is incorrect. jh is one of the sides of the triangle, not the altitude.
gj is an altitude of gjh: This option is incorrect. gj is one of the sides of the triangle, not the altitude.
Therefore, the correct option is: gi is an altitude of gji.