Geometric shapes in 300: Shared baseline

Euclid’s Elements (~300 BCE) still names the school set; modern UI reuses it closed outlines whose corners and symmetry carry meaning Yes if one claim is visible at a glance in Meta, Google and retail print; otherwise link to a full figure. Yes for lab reports and poster boards if axes, units and a source line are present.

Excel or Google Sheets or PowerPoint; export SVG/PDF. Do not rely on hue alone. Label directly and check greyscale. Geometric shapes: honour closed outlines whose corners and symmetry carry meaning, and switch when you need to encode a quantity — use a chart, not a pretty triangle.

The core mark of Geometric shapes is closed outlines whose corners and symmetry carry meaning. The eye compares length and position more accurately than area. PowerPoint, Excel or Google Sheets and Meta, Google and retail print share the same geometry. Decoration rarely persuades; it slows reading.