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An elliptic paraboloid is shaped like an oval cup and has a maximum or minimum point when its axis is vertical. In a suitable coordinate system with three axes x , y , and z , it can be represented by the equation [ 1 ] z = x 2 a 2 + y 2 b 2 . {\displaystyle z={\frac {x^{2}}{a^{2}}}+{\frac {y^{2}}{b^{2}}}.} where a and b are constants that ...
Q-shape, the shape that resembles the capital letter Q; R-shape, the shape that resembles the capital letter R; S-shape, the shape that resembles the capital letter S. The sigmoid colon, an S-shaped bend in the human intestine; S-twist, contrasted with Z-twist for yarn; T-shape, the shape that resembles the capital letter T. T junction
In mathematics, a parabola is a plane curve which is mirror-symmetrical and is approximately U-shaped. It fits several superficially different mathematical descriptions, which can all be proved to define exactly the same curves. One description of a parabola involves a point (the focus) and a line (the directrix). The focus does not lie on the ...
Hemihelix, a quasi-helical shape characterized by multiple tendril perversions Tendril perversion (a transition between back-to-back helices) Seiffert's spiral [4]
The elements of a polytope can be considered according to either their own dimensionality or how many dimensions "down" they are from the body.
A parabolic antenna is an antenna that uses a parabolic reflector, a curved surface with the cross-sectional shape of a parabola, to direct the radio waves. The most common form is shaped like a dish and is popularly called a dish antenna or parabolic dish. The main advantage of a parabolic antenna is that it has high directivity.
It may sound like a chore, but cleaning doesn’t just dust the literal cobwebs away; it’s also a great way to clear your head and leaves you with a sense of accomplishment. 15. Try 'junk ...
Strictly, the three-dimensional shape of the reflector is called a paraboloid. A parabola is the two-dimensional figure. (The distinction is like that between a sphere and a circle.) However, in informal language, the word parabola and its associated adjective parabolic are often used in place of paraboloid and paraboloidal. [2]