Et heksaeder (eller hexaeder) er et polyeder med seks sider. Et velkendt hexaeder er terningen. Firkantsideflade-heksaeder (kasseformet) 6 sider, 12 kanter, 8 hjørnerlink=https://en.wikipedia.org/wiki/File:Hexahedron.png|110x110pxlink=https://en.wikipedia.org/wiki/File:Cuboid.png|110x110pxlink=https://en.wikipedia.org/wiki/File:Trigonal_trapezohedron.png|117x117pxlink=https://en.wikipedia.org/wiki/File:Trigonal_trapezohedron_gyro-side.png|133x133pxlink=https://en.wikipedia.org/wiki/File:Usech_kvadrat_piramid.png|110x110pxlink=https://en.wikipedia.org/wiki/File:Parallelepiped_2013-11-29.svg|110x110pxlink=https://en.wikipedia.org/wiki/File:Rhombohedron.svg|110x110pxTerning (kvadrat)Rektangulær kasse (tre par af rektangler)Trigonalt trapezoeder (kongruente romber)Trigonalt trapezoeder (kongruente firkanter)Firsidet keglestub (apeks-afkortet kvadratisk pyramide)Parallelepipedum (tre par af parallelogrammer)(tre par af romber)Oh, [4,3], (*432) orden 48D2h, [2,2], (*222) orden 8D3d, [2+,6], (2*3) orden 12D3, [2,3]+, (223) orden 6C4v, , (*44) orden 8Ci, [2+,2+], (×) orden 2 Andre link=https://en.wikipedia.org/wiki/File:Hexahedron5.svg|100x100pxTriangulært bipyramide 36 Sider 9 K, 5 Hlink=https://en.wikipedia.org/wiki/File:Hexahedron7.svg|75x75pxlink=https://en.wikipedia.org/wiki/File:Hexahedron7a.svg|75x75pxTetragonal antikile. Chiral – findes i "venstre-håndet" og "højre-håndet" spejlede former. 4.4.3.3.3.3 Sider 10 K, 6 Hlink=https://en.wikipedia.org/wiki/File:Hexahedron6.svg|100x100px4.4.4.4.3.3 Sider 11 K, 7 Hlink=https://en.wikipedia.org/wiki/File:Hexahedron2.svg|100x100pxPentagonal pyramide 5.35 Sider 10 K, 6 Hlink=https://en.wikipedia.org/wiki/File:Hexahedron3.svg|100x100px5.4.4.3.3.3 Sider 11 K, 7 Hlink=https://en.wikipedia.org/wiki/File:Hexahedron4.svg|100x100px5.5.4.4.3.3 Sider 12 K, 8 H Der er tre yderligere topologisk særskilte hexahedra, der kun kan realiseres som konkaviske figurer:

Konkavlink=https://en.wikipedia.org/wiki/File:Hexahedron8.svg|100x100px4.4.3.3.3.3 Sider 10 K, 6 Hlink=https://en.wikipedia.org/wiki/File:Hexahedron10.svg|100x100px5.5.3.3.3.3 Sider 11 H, 7 Klink=https://en.wikipedia.org/wiki/File:Hexahedron9.svg|100x100px6.6.3.3.3.3 Sider 12 K, 8 H

Kategori:Platoniske legemer