Figures Shape Trunk (f) is defined as the ratio or the ratio between the actual stem volume with the volume of a cylinder that has the same height or length. Based diameter are used to calculate the volume of the cylinder, the numbers form distinguished by: (1) number absolute form; (2) number of artificial forms; (3) The number of normal forms. Figures form of absolute (absolute form factor) is the number of the form in which the volume of the cylinder using LBDs based on the diameter of the base of the stem.