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icosahedron    
n. 二十面体

二十面体

icosahedron
n 1: any polyhedron having twenty plane faces

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  • Icosahedron - Wikipedia
    A regular icosahedron is topologically identical to a cuboctahedron with its 6 square faces bisected on diagonals with pyritohedral symmetry The icosahedra with pyritohedral symmetry constitute an infinite family of polyhedra which include the cuboctahedron, regular icosahedron, Jessen's icosahedron, and double cover octahedron
  • Icosahedron - Math is Fun
    A 3D shape with 20 flat faces Notice these interesting things: It has 20 faces It has 30 edges It has 12 vertices (corner points)
  • Icosahedron - Cuemath
    Icosahedron An icosahedron is a three-dimensional shape with twenty faces which makes it a polyhedron It is one of the few platonic solids In this lesson, we will discuss more about the shape of Icosahedron and formulas related to it with the help of solved examples Stay tuned to learn more!
  • 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 3…
  • Icosahedron - Math. net
    Icosahedron 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 What is an icosahedron An icosahedron is a three-dimensional figure made up of only polygons One real life icosahedron example is a
  • Icosahedron | Definition, Examples, Parts, Properties Nets
    The icosahedron is one of the most fascinating three-dimensional shapes there is The name “icosahedron,” which derives from the Greek terms “íkosi” (which means twenty) and “hédra” (which implies seat or face), describes a fascinating shape with special features that is an integral part of the world we live in
  • Icosahedron: Definition, Properties Real-Life Examples - Vedantu
    An icosahedron is a three-dimensional geometric shape, specifically a polyhedron, that has exactly 20 faces In its most common form, the regular icosahedron, all faces are identical equilateral triangles It is one of the five convex regular polyhedra known as the Platonic solids, distinguished by its symmetrical and uniform structure
  • Regular Icosahedron — Definition, Formula Examples
    A regular icosahedron is a convex polyhedron composed of 20 congruent equilateral triangular faces, 30 edges of equal length, and 12 vertices, each of which is the meeting point of exactly 5 faces Its symmetry group is the icosahedral group of order 120
  • Icosahedron - Interactive Mathematics
    The icosahedron is a popular choice for use in mathematics, as it is a symmetrical shape that is easily constructed It can be used to explore the properties of 3D geometry, as well as to help students understand the concept of Platonic solids and polyhedra
  • 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") Examples illustrated above include the decagonal dipyramid, elongated triangular gyrobicupola (Johnson solid ), elongated triangular orthobicupola (), gyroelongated triangular cupola (), Jessen's orthogonal icosahedron





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