Jay Jay (voiced originally by Mary Kay Bergman in Seasons 1-2, then later by Debi Derryberry in Season 3 and the reboot after Bergman's death and Donna Cherry in Jay Jay's Mysteries in the CGI/live-action series) is a small blue 6-year-old (originally brown in some of the pilot series) jet plane who acts as a twin brother figure. He is the ...

A projective plane is defined axiomatically as an incidence structure, in terms of a set P of points, a set L of lines, and an incidence relation I that determines which points lie on which lines. As P and L are only sets one can interchange their roles and define a plane dual structure. By interchanging the role of "points" and "lines" in C ...

In geometry, a vertex figure, broadly speaking, is the figure exposed when a corner of a polyhedron or polytope is sliced off. Definitions "Whole-edge" vertex figure of the cube ... cutting all edges incident to a given vertex at equal distances from the vertex may produce a figure that does not lie in a plane. A more general approach, valid ...

Sabena Flight 548 was a Boeing 707-329 flight operated by Sabena that crashed en route from New York City to Brussels, Belgium, on February 15, 1961.The flight, which had originated at Idlewild International Airport, crashed on approach to Brussels Airport, Brussels, killing all 72 people on board and one person on the ground. The fatalities included the entire United States …

Area is the quantity that expresses the extent of a region on the plane or on a curved surface.The area of a plane region or plane area refers to the area of a shape or planar lamina, while surface area refers to the area of an open surface or the boundary of a three-dimensional object.Area can be understood as the amount of material with a given thickness that would be necessary to …

In electrical engineering, a ground plane is an electrically conductive surface, usually connected to electrical ground.. The term has two different meanings in separate areas of electrical engineering. In antenna theory, a ground plane is a conducting surface large in comparison to the wavelength, such as the Earth, which is connected to the transmitter's ground wire and …

The plane-triangle congruence theorem angle-angle-side (AAS) does not hold for spherical triangles. As in plane geometry, side-side-angle (SSA) does not imply congruence. Notation. A symbol commonly used for congruence is an equals symbol with a tilde above it, ≅, corresponding to the Unicode character 'approximately equal to' (U+2245).

Francis Gary Powers (August 17, 1929 – August 1, 1977) was an American pilot whose Central Intelligence Agency (CIA) Lockheed U-2 spy plane was shot down while flying a reconnaissance mission in Soviet Union airspace, causing the 1960 U-2 incident.. He later worked as a helicopter pilot for KNBC in Los Angeles and died in a 1977 helicopter crash

Euclidean geometry is a mathematical system attributed to ancient Greek mathematician Euclid, which he described in his textbook on geometry: the Elements.Euclid's approach consists in assuming a small set of intuitively appealing axioms (postulates) and deducing many other propositions from these.Although many of Euclid's results had been stated earlier, Euclid was …

A polyomino is a plane geometric figure formed by joining one or more equal squares edge to edge. It is a polyform whose cells are squares. It may be regarded as a finite subset of the regular square tiling.. Polyominoes have been used in popular puzzles since at least 1907, and the enumeration of pentominoes is dated to antiquity. Many results with the pieces of 1 to 6 …

A Lissajous curve / ˈ l ɪ s ə ʒ uː /, also known as Lissajous figure or Bowditch curve / ˈ b aʊ d ɪ tʃ /, is the graph of a system of parametric equations = ⁡ (+), = ⁡ (), which describe complex harmonic motion.This family of curves was investigated by Nathaniel Bowditch in 1815, and later in more detail in 1857 by Jules Antoine Lissajous (for whom it has been named).

A Penrose tiling is an example of an aperiodic tiling.Here, a tiling is a covering of the plane by non-overlapping polygons or other shapes, and aperiodic means that shifting any tiling with these shapes by any finite distance, without rotation, cannot produce the same tiling. However, despite their lack of translational symmetry, Penrose tilings may have both reflection symmetry and …

Nikita Sergeyevich Khrushchev (15 April [O.S. 3 April] 1894 – 11 September 1971) was the First Secretary of the Communist Party of the Soviet Union from 1953 to 1964 and chairman of the country's Council of Ministers from 1958 to 1964. During his rule, Khrushchev stunned the communist world with his denunciation of Stalin's crimes, and embarked on a policy of de …

René Descartes (/ d eɪ ˈ k ɑːr t / or UK: / ˈ d eɪ k ɑːr t /; French: [ʁəne dekaʁt] (); Latinized: Renatus Cartesius; 31 March 1596 – 11 February 1650: 58 ) was a French philosopher, scientist, and mathematician, widely considered a seminal figure in the emergence of modern philosophy and science.Mathematics was central to his method of inquiry, and he connected the …