# Dodecahedron Sentence Examples

The truncated

**dodecahedron**is formed by truncating the vertices of a**dodecahedron**parallel to the faces of the coaxial icosahedron so as to leave the former decagons.The pentagon is the basis of the

**dodecahedron**.It is enclosed by 20 triangular faces belonging to the icosahedron and 12 decagons belonging to the

**dodecahedron**.Shown above is an icosahedron of twelve dodecahedral structures surrounding a central

**dodecahedron**; (H 2 O) 130.Unfortunately, my magnetic kit didn't have enough connectors to make a

**dodecahedron**, so here is a child's ball instead.The form of David Mitchell's Six-way Brick is a rhombic

**dodecahedron**from which twelve small rhombic pyramids have been removed.It is not actually a regular

**dodecahedron**, although it has 12 faces, each with 5 sides, but it is quite close.The triply periodic structure is generated by reflections in the faces of the rhombic

**dodecahedron**.The form of David Mitchell's Six-way Brick is a rhombic

**dodecahedron**from which twelve small rhombic**dodecahedron**from which twelve small rhombic pyramids have been removed.If it is evaporated slowly, anhydrous stannous oxide crystallizes out in forms which are combinations of the cube and

**dodecahedron**.AdvertisementIn crystallography the icosahedron is a possible form, but it has not been observed; it is closely simulated by a combination of the octahedron and pentagonal

**dodecahedron**, which has twenty triangular faces, but only eight are equilateral, the remaining twelve being isosceles (see Crystallography).The "ordinary

**dodecahedron**" is one of the Platonic solids (see Polyhedron).The "small stellated

**dodecahedron**," the "great**dodecahedron**" and the "great stellated**dodecahedron**" are Kepler-Poinsot solids; and the "truncated" and "snub dodecahedra" are Archimedean solids (see Polyhedron).It is the reciprocal (see below) of the small stellated

**dodecahedron**.The snub

**dodecahedron**is a 92-faced solid having 4 triangles and a pentagon at each corner.AdvertisementElie de Beaumont, in his speculations on the relation between the direction of mountain ranges and their geological age and character, was feeling towards a comprehensive theory of the forms of crustal relief; but his ideas were too geometrical, and his theory that the earth is a spheroid built up on a rhombic

**dodecahedron**, the pentagonal faces of which determined the direction of mountain ranges, could not be proved.'The "rhombic

**dodecahedron**," one of the geometrical semiregular solids, is an important crystal form.The great icosahedron is the reciprocal of the great stellated

**dodecahedron**.It is enclosed by 20 triangular faces belonging to the original icosahedron, and 12 pentagonal faces belonging to the coaxial

**dodecahedron**.It is therefore enclosed by 20 hexagonal faces belonging to the icosahedron, and 12 pentagonal faces belonging to the coaxial

**dodecahedron**.AdvertisementCrystals of blende belong to that subclass of the cubic system in which there are six planes of symmetry parallel to the faces of the rhombic

**dodecahedron**and none parallel to the cubic faces; in other words, the crystals are cubic with inclined hemihedrism, and have no centre of symmetry.An important character of blende is the perfect dodecahedral cleavage, there being six directions of cleavage parallel to the faces of the rhombic

**dodecahedron**, and angles between which are 600.Percussionfigures, readily made on the cleavage-faces, have rays parallel to faces of the rhombic

**dodecahedron**; whilst figures etched with water represent the four-faced cube.The Greeks discovered that if a line be divided in extreme and mean proportion, then the whole line and the greater segment are the lengths of the edge of a cube and

**dodecahedron**inscriptible in the same sphere.In crystallography, the regular or ordinary

**dodecahedron**is an impossible form since the faces cut the axes in irrational ratios; the "pentagonal**dodecahedron**" of crystallographers has irregular pentagons for faces, while the geometrical solid, on the other hand, has regular ones.AdvertisementIn the " small rhombicosidodecahedron " there are 12 pentagonal faces belonging to the

**dodecahedron**, 20 triangular faces belonging to the icosahedron and 30 square faces belonging to the triacontahedron.The pentagons belong to a

**dodecahedron**, and 20 triangles to an icosahedron; the remaining 60 triangles belong to no regular solid.The first three were certainly known to the Egyptians; and it is probable that the icosahedron and

**dodecahedron**were added by the Greeks.The small stellated

**dodecahedron**is formed by stellating the Platonic**dodecahedron**(by "stellating " is meant developing the faces contiguous to a specified base so as to form a regular pyramid).The great

**dodecahedron**is determined by the intersections of the twelve planes which intersect the Platonic icosahedron in five of its edges; or each face has the same boundaries as the basal sides of five covertical faces of the icosahedron.The great stellated

**dodecahedron**is formed by stellating the faces of a great**dodecahedron**.African stones; and the

**dodecahedron**is perhaps more common in Brazil than elsewhere.Thus the faces of the cuboctahedron, the truncated cube, and truncated octahedron, correspond; likewise with the truncated

**dodecahedron**, truncated icosahedron, and icosidodecahedron; and with the small and great rhombicosidodecahedra.The rhombic faces of the

**dodecahedron**are often striated parallel to the longer diagonal.As examples of facial holohedra we may notice the small rhombicuboctahedron and rhombic

**dodecahedron**, and the small rhombicosidodecahedron and the semiregular triacontahedron.