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  2. Table tennis - Wikipedia

    en.wikipedia.org/wiki/Table_tennis

    Diagram of a table tennis table showing the official dimensions The table is 2.74 m (9.0 ft) long, 1.525 m (5.0 ft) wide, and 76 cm (2.5 ft) high with any continuous material so long as the table yields a uniform bounce of about 23 cm (9.1 in) when a standard ball is dropped onto it from a height of 30 cm (11.8 in), or about 77%.

  3. Glossary of table tennis - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_table_tennis

    Table tennis racket Also known as a paddle or bat, is used by table tennis players. The table tennis racket is usually made from laminated wood covered with rubber on one or two sides depending on the player's grip. The USA generally uses the term "paddle" while Europeans and Asians use the term "bat" and the official ITTF term is "racket". [17]

  4. Ping-pong lemma - Wikipedia

    en.wikipedia.org/wiki/Ping-pong_lemma

    The ping-pong argument goes back to the late 19th century and is commonly attributed [1] to Felix Klein who used it to study subgroups of Kleinian groups, that is, of discrete groups of isometries of the hyperbolic 3-space or, equivalently Möbius transformations of the Riemann sphere.

  5. Descriptive geometry - Wikipedia

    en.wikipedia.org/wiki/Descriptive_geometry

    To get a true view (length in the projection is equal to length in 3D space) of one of the lines: SU in this example, projection 3 is drawn with hinge line H 2,3 parallel to S 2 U 2. To get an end view of SU, projection 4 is drawn with hinge line H 3,4 perpendicular to S 3 U 3. The perpendicular distance d gives the shortest distance between PR ...

  6. Plane of rotation - Wikipedia

    en.wikipedia.org/wiki/Plane_of_rotation

    In odd dimensions (n = 3, 5, 7, ...) there are ⁠ n − 1 / 2 ⁠ planes and angles of rotation, the same as the even dimension one lower. These do not span the space, but leave a line which does not rotate – like the axis of rotation in three dimensions, except rotations do not take place about this line but in multiple planes orthogonal to ...

  7. Biggest upset of the Olympics? World No. 1 table tennis ...

    www.aol.com/sports/biggest-upset-olympics-world...

    Sweden's Truls Möregårdh pulled off the upset of the 2024 Paris Olympics after he defeated China's Wang Chuqin, the top-ranked table tennis player in the world, in men's singles action on Wednesday.

  8. Chebyshev lambda linkage - Wikipedia

    en.wikipedia.org/wiki/Chebyshev_Lambda_Linkage

    A Chebyshev Translating Table Linkage, which combines together two cognate linkages: the Chebyshev Linkage and Chebyshev Lambda Linkage. In kinematics , the Chebyshev Lambda Linkage [ 1 ] is a four-bar linkage that converts rotational motion to approximate straight-line motion with approximate constant velocity. [ 2 ]

  9. Euclidean planes in three-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Euclidean_planes_in_three...

    The three possible plane-line relationships in three dimensions. (Shown in each case is only a portion of the plane, which extends infinitely far.) In analytic geometry, the intersection of a line and a plane in three-dimensional space can be the empty set, a point, or a line. It is the entire line if that line is embedded in the plane, and is ...