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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 - 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 - Cuemath
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
- 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 - Math. net
What is an icosahedron An icosahedron is a three-dimensional figure made up of only polygons One real life icosahedron example is a 20-sided die, also referred to as D20: The 20-sided die above is an example of a regular icosahedron, since all of its faces are made up of 20 equilateral triangles
- Icosahedron -- from Wolfram MathWorld
The (general) icosahedron is a 20-faced polyhedron (where icos- derives from the Greek word for "twenty" and -hedron comes from the Indo-European word for "seat")
- Icosahedron - Virtual Math Museum
When a newly created face becomes equilateral triangle, it is a icosahedron Wireframe shows edge truncated icosahedron, inside is its dual, which has 60 congruent quadrilateral faces (kites)
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