The Perpendicular Distance Determinant, as we have seen thus far, has predicted the displacement of the altitude on a horizontal base triangle. This method has provided a new insight into looking at triangles and has led to a 90 percent PDD accuracy into predicting the displacement x in a ultraperfect altitudinal triangle and a 100 per cent accuracy for predicting displacement in a perfect altitudinal triangle and any right triangle. This formula has been a key toward some of its applications in a ultraperfect altitudinal triangle. This segment covers its potentiality in a perfect altitudinal triangle.