the.com/decagon
a ten-sided overachiever that thinks the hexagon isn't trying hard enough.
means A flat, closed shape with ten straight sides and ten angles.
from From Greek 'deka' (ten) plus 'gonia' (angle, corner) — the same '-gon' that gives us polygon, pentagon, and hexagon. 'Gonia' is a cousin of 'gony,' meaning knee, the original bent joint that gave geometry its language of angles.
- interior angles
- each corner sits at exactly 144 degrees
- sum total
- all angles add up to 1440 degrees
- diagonals
- hides 35 diagonals inside its ten sides
- golden link
- regular ones encode the golden ratio in their geometry
- name origin
- Greek deka, ten, plus gonia, angle
for instance
usda organic seal — 10-sided polygon used on certified organic products in the united states
game of decagons — mathematical puzzle game where players arrange 10-sided tiles, commercially released