Please refer to the images below for the shapes. There is no image for Unknown.
Truncated Triangular Pyramid
Please note the same Side Change Ratio is applied to all the sides of the triangular surface.
Truncated Rectangular Pyramid
Please note the same Side Change Ratio is applied to all the sides of the rectangular surface.
Truncated Wedge
Please note for a wedge, the length of the Length side is the same for the top and bottom surface.