9: Geometry
( \newcommand{\kernel}{\mathrm{null}\,}\)
Thumbnail: A two-dimensional perspective projection of a sphere (CC BY-3.0; Geek3 via Wikipedia).
( \newcommand{\kernel}{\mathrm{null}\,}\)
Thumbnail: A two-dimensional perspective projection of a sphere (CC BY-3.0; Geek3 via Wikipedia).