# Icosahedron sentence example

This is the

**icosahedron**.Shown above is an

**icosahedron**of twelve dodecahedral structures surrounding a central dodecahedron; (H 2 O) 130.F rotates the

**icosahedron**in various ways apparently looking for pentagon based pyramids on the " left " and " right " hand sides.Stainless steel nickel plated candle holder (20 sides - each side 1811 - see Para 12) shape is called an

**icosahedron**.This category includes the 13-atom

**icosahedron**, which can be decomposed into twenty tetrahedra sharing a common vertex.AdvertisementSeveral of these arise naturally as crystals, and the truncated

**icosahedron**occurs in real life as a football.The energy is measured relative to the energy of the global minimum

**icosahedron**.Structure 69C has a vertex atom missing from the underlying Mackay

**icosahedron**like 38A.Further growth then leads to the next Mackay

**icosahedron**.In order to see some of these more clearly, 64 of the 280 water molecules have been removed from the water

**icosahedron**.AdvertisementThe "regular

**icosahedron**" is one of the Platonic solids; the "great**icosahedron**" is a Kepler-Poinsot solid; and the "truncated**icosahedron**" is an Archimedean solid (see Polyhedron).In 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 distance between adjacent vertices of the

**icosahedron**is 5% longer than the distance between a vertex and the center.Nevertheless, holding that every dimension has a principle of its own, he rejected the derivation of the elemental solids - pyramid, octahedron,

**icosahedron**and cube - from triangular surfaces, and in so far approximated to atomism.The first three were certainly known to the Egyptians; and it is probable that the

**icosahedron**and dodecahedron were added by the Greeks.AdvertisementThe equilateral triangle is the basis of the tetrahedron, octahedron and

**icosahedron**.'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

**icosahedron**is the reciprocal of the great stellated dodecahedron.Each of the twenty triangular faces subtend at the centre the same angle as is subtended by four whole and six half faces of the Platonic

**icosahedron**; in other words, the solid is determined by the twenty planes which can be drawn through the vertices of the three faces contiguous to any face of a Platonic**icosahedron**.It is enclosed by 20 triangular faces belonging to the original

**icosahedron**, and 12 pentagonal faces belonging to the coaxial dodecahedron.AdvertisementThe truncated

**icosahedron**is formed similarly to the icosidodecahedron, but the truncation is only carried far enough to leave the original faces hexagons.It is therefore enclosed by 20 hexagonal faces belonging to the

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

**icosahedron**and 12 decagons belonging to the dodecahedron.In 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.AdvertisementThe pentagons belong to a dodecahedron, and 20 triangles to an

**icosahedron**; the remaining 60 triangles belong to no regular solid.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 boron skeleton takes the form of a regular

**icosahedron**.