IH and JK are the minor arcs because the other arcs (IJ and HK) are major arcs. They (IH and JK) are minor arcs because they are acute angle and the other arcs are Obtuse.
IK and HJ are semicircles because they are two points that is forming a line between the circle. two points that are connected, is already a semicircle.
HK is a major arc because it's central angle is obtuse.
