Disphenoid (/m/0274w0q)

In geometry, a disphenoid is a tetrahedron whose four faces are congruent acute-angled triangles. It can also be described as a tetrahedron in which every two edges that are opposite each other have equal lengths. Other names are isosceles tetrahedron and equifacial tetrahedron. They can also be seen as digonal antiprisms as an alternated quadrilateral prism. All the solid angles and vertex figures of a disphenoid are the same, and the sum of the face angles at each vertex is equal to two right angles. However, a disphenoid is not a regular polyhedron, because, in general, its faces are not regular polygons, and it is not edge-transitive .
Other types
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  • /wikipedia/de/Gleichschenkliges_Tetraeder
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  • /wikipedia/en/Rhombic_disphenoid
  • /wikipedia/he/יתדון
  • /wikipedia/it/Disfenoide
  • /wikipedia/ru/Равногранный_тетраэдр
  • /wikipedia/sl/Disfenoid
  • /wikipedia/zh-cn/二面体锲形体
  • /wikipedia/zh-cn/二面體鍥形體
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  • /wikipedia/zh-tw/二面體鍥形體
  • /wikipedia/zh-tw/复斜方锲形体
  • /wikipedia/zh-tw/复正方锲形体
  • /wikipedia/zh-tw/楔形体
  • /wikipedia/zh-tw/楔形體
  • /wikipedia/zh-tw/複斜方鍥形體
  • /wikipedia/zh-tw/複正方鍥形體
  • /wikipedia/zh-tw/鍥形體
  • /wikipedia/zh-tw/锲形体
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