Reply To: Orthographic graphics with side labels in print
The "mat plan" and "layering method" described in GSTG 6.15 and 6.16 are used to help learners work up to the concept of volume by counting blocks inscribed on a flat surface. Once students understand that they can slice an object into layers and determine area by counting those blocks, they have made a step toward understanding volume.
And -- jumping many years ahead -- the same idea of slicing an object into pieces, determining the approximate area of each slice, and then adding all those slices together, will come in handy when students encounter integral calculus!
