\coordinate (temp1) at ($(a-incoming boundary.west)!0.3!(a-outgoing boundary.west) +(0,0.08)$); \coordinate (temp2) at ($(a-incoming boundary.west)!0.7!(a-outgoing ...

This tool allows you to learn about various geometric solids and their properties. You can manipulate and color each shape to explore the number of faces, edges, and vertices, and you can also use ...

% this could be the easiest way to draw 3d objects by using plot and function ...