Figure 10A - Images of buccal apices of the maxillary left first molar record mesially and distally to the lingual root.

Figure 10B - Changing the HA distally causes images of the buccal apices to move distally relative to the lingual root. Apply Clue No. 3 of the BOR to determine the location of object X relative to the apices of the maxillary left second molar.