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A line segment, also known as an interval or closed interval, is 2 connected points.

It can be considered as being the solid interior of the 0-dimensional hypersphere, the point pair.

A circle can be made by rotating a line segment around the middle axis.

People often refer to it as a line. A proper line has infinite length. They refer to a line segment when they mean line.

A line segment is actually made of an infinite number of points as the line connecting the two points is made up of an infinite number of points.

Hypervolumes

• vertex count = $2$
• edge length = $l$

Subfacets

Zeroth First Second Third Fourth Fifth Sixth Seventh Eighth Ninth Tenth Eleventh Twelfth Thirteenth Fourteenth Fifteenth Sixteenth ... Omegath
Hypercube Point Line segment Square Cube Tesseract Penteract Hexeract Hepteract Octeract Enneract Dekeract Hendekeract Dodekeract Tridekeract Tetradekeract Pentadekeract Hexadekeract ... Omegeract
Hyperball Point Line segment Disk Ball Gongol Pentorb Hexorb Heptorb Octorb Enneorb Dekorb Hendekorb Dodekorb Tridekorb Tetradekorb Pentadekorb Hexadekorb ... Omegaball
$_1\{\}$ $\{\}$ $_3\{\}$ $_4\{\}$ $_5\{\}$ $_6\{\}$
Henatelon Line segment Tricomtelon Tetracomtelon Pentacomtelon Hexacomtelon
Zeroth First Second Third Fourth Fifth
Cosmotopes Point Line segment Pentagon Dodecahedron Hecatonicosachoron Order-3 Hecatonicosachoron honeycomb
Hydrotopes Point Line segment Pentagon Icosahedron Hexacosichoron Order-5 Pentachoron honeycomb