polyiamond

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English

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Wikipedia
3 different polyiamonds consisting of four triangles.

Etymology

Blend of poly- +‎ diamond, the polyiamond made up of two triangles being a diamond or rhombus.

Noun

polyiamond (plural polyiamonds)

  1. (geometry) A polyform made by joining one or more equilateral triangles edge to edge in various arrangements. Every polyiamond corresponds to a polyhex,

Synonyms

Derived terms

Name Number of forms Forms
moniamond 1
diamond 1
triamond 1
tetriamond 3
pentiamond 4
hexiamond 12

bar
rhomboid

crook
club

crown

sphinx

snake

yacht

chevron
bat

signpost
pistol

lobster

hook
shoe

hexagon

butterfly

Some authors also call the diamond (rhombus with a 60° angle) a calisson after the French sweet of similar shape.

See also

Anagrams