What differentiates an educational psychologist from other psychologists or specialists is constituted by an academic triangle whose vertexes are represented by three categories: teachers, students and curricula (see diagram).
Now we consider the all-vertex problem where the message will have to be sent in both the directions and state must be computed at both the vertexes.
The cross-sectional polygonal shape can gain extra vertexes as new branches grow from the sides.
It has a quadrangular plan in brick with four round towers at the vertexes.
A polygon is an area formed from at least three vertexes (a triangle).
The geometrical meaning of this manipulation is the manipulation of the convex hull defined by the vertexes.
Objects may be composed of primitives such as spheres, or more complex shapes made by extruding polygons along the z axis and adjusting the vertexes.
In essence, every edge is just an internal node of a tree or directed acyclic graph, and vertexes are the leaf nodes.
