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In geometry, a Platonic solid is a convex, regular polyhedron in three-dimensional Euclidean space.Being a regular polyhedron means that the faces are congruent (identical in shape and size) regular polygons (all angles congruent and all edges congruent), and the same number of faces meet at each vertex.
When a surface has a constant zero Gaussian curvature, then it is a developable surface and the geometry of the surface is Euclidean geometry.. When a surface has a constant positive Gaussian curvature, then the geometry of the surface is spherical geometry.
A set of the three most common French curves, also known as a Burmester set. The bottom object is most commonly used for hyperbolas; the smaller one above it is suited for ellipses.
The terminal of Washington Dulles International Airport is an example of a catenary suspended structure.. A suspended structure is a structure which is supported by cables coming from beams or trusses which sit atop a concrete center column or core.
A light source passes behind a gravitational lens (invisible point mass placed in the center of the image). The aqua circle is the light source as it would be seen if there were no lens, while white spots are the multiple images of the source (see Einstein ring).
Electron transfer between lithium (Li) and fluorine (F). Forming an ionic bond, Li and F become Li + and F − ions.. An ion (/ ˈ aɪ. ɒ n,-ən /) [1] is an atom or molecule with a net electrical charge.
Mortal Kombat is an American media franchise centered on a series of fighting video games originally developed by Midway Games in 1992.. The original Mortal Kombat arcade game spawned a franchise consisting of action-adventure games, a comic book series, a card game, films, an animated TV series, and a live-action tour.
Li Sisi (Chinese: 李思思; pinyin: Lǐ Sīsī; born 4 November 1986) is a Chinese television host and media personality. She rose to fame in 2006 when she earned a third-place finish on the reality TV show Host Challenge . [ 1 ]