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- Icosahedron - Wikipedia
In geometry, an icosahedron ( ˌaɪkɒsəˈhiːdrən, - kə -, - koʊ - or aɪˌkɒsəˈhiːdrən [1]) is a polyhedron with 20 faces The name comes from Ancient Greek εἴκοσι (eíkosi) 'twenty' and ἕδρα (hédra) 'seat' The plural can be either "icosahedra" ( - drə ) or "icosahedrons"
- Icosahedron
The icosahedron's definition is derived from the ancient Greek words Icos (eíkosi) meaning 'twenty' and hedra (hédra) meaning 'seat' It is one of the five platonic solids with equilateral triangular faces
- Spinning Icosahedron - Math is Fun
For a regular icosahedron (where all faces are equilateral triangles): The name icosahedron comes from the Greek icosa- meaning 20, because it is a polyhedron with 20 faces When we have more than one icosahedron they are called icosahedra
- Icosahedron - Math. net
An icosahedron is a polyhedron with 20 faces The prefix "icosa" means twenty When "icosahedron" is used without any qualifiers, we assume that it is a regular icosahedron, which is an icosahedron in which the 20 faces are all equilateral triangles An icosahedron is a three-dimensional figure made up of only polygons
- Regular Icosahedron -- from Wolfram MathWorld
The regular icosahedron, often simply called "the" icosahedron, is the regular polyhedron and Platonic solid illustrated above having 12 polyhedron vertices, 30 polyhedron edges, and 20 equivalent equilateral triangle faces, 20 {3}
- Icosahedron – The Geometry of Thinking
The icosahedron is distinguished from the other regular polyhedra in that it has an irrational volume both in tetrahedra and cubes Its isolation is further reinforced by its axes of spin and the 31 great circles they describe
- Icosahedron | Definition, Examples, Parts, Properties Nets
An icosahedron has 30 edges—the angle between the edges of an icosahedron measures 60° The corners of an icosahedron, where the faces meet, are called vertices
- Icosahedron - A regular polyhedron with 20 faces - One of the platonic . . .
An icosahedron is a regular polyhedron that has 20 faces All the faces are equilateral triangles and are all congruent, that is, all the same size It is one of the five Platonic solids
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