Point groups in three dimensions the finite subgroups of SO(3), are: the cyclic groups "C" (the rotation group of a canonical pyramid), the dihedral groups "D" (the rotation group of a uniform prism, or canonical bipyramid), and the rotation groups "T", "O" and "I" of a regular tetrahedron, octahedron/cube and icosahedron/dodecahedron. In particular, the dihedral groups "D", "D" etc. are the rotation groups of plane regular polygons embedded in three-dimensional space, and such a figure may be considered as a degenerate regular prism. Therefore, it is also called a "dihedron" (Greek: solid with two faces), which explains the name "dihedral group". The rotation group of
A Thousand Faces (play) "Whatsonstage.com" called it "a bold dance piece". A Thousand Faces (play) A Thousand Faces is a concert dance play by British dancer Amina Khayyam. "A Thousand Faces" is a story of women who are discriminately attacked because of their gender, often caught up within cultural expectations. "A Thousand Faces" explores what independence has meant for Bangladeshi women – and if 'freedom' is a notion that they can identify with using dance, costume and puppetry. The dance piece that uses Kathak's intricate and detailed theatrical movements of abhinaya. The production aims to raise awareness of acid violence. "A Thousand Faces" premiered