* Kite ( geometry ), also known as a deltoid, a type of quadrilateral

* Kite ( song ), by U2

* Kite ( band ), a Swedish synthpop duo

* Kite ( film ), a 1998 hentai anime film

* The Kite ( film ), a 2003 Lebanese drama

* Kite (. hack ), a fictional character

Pepys was born in Salisbury Court, Fleet Street, London on 23 February 1633, to John Pepys ( 1601 – 1680 ), a tailor, and Margaret Pepys ( née Kite ; d. 1667 ), daughter of a Whitechapel butcher.

The team of design engineers assisting the development included Robert F. Shaw ( function tables ), Jeffrey Chuan Chu ( divider / square-rooter ), Thomas Kite Sharpless ( master programmer ), Arthur Burks ( multiplier ), Harry Huskey ( reader / printer ) and Jack Davis ( accumulators ).

The year saw activities such as an exhibition at Tregaron Kite Centre ( the Red Kite is common in the area ), a charity walk from his cave to his birthplace and the launching of three very special books.

* Baba ( The Kite Runner ), a character in The Kite Runner media

There are for example populations of threatened birds, including colonies of breeding water birds such as the world's largest populations of the near-threatened Asian Openbill ( Anastomus oscitans ), and other birds such as the wintering Black Kite ( Milvus migrans ).

* Go Fly A Kite ( 1966 ), an industrial musical for General Electric

European and central Asian birds ( subspecies M. m. milvus and Black-eared Kite M. m. lineatus, respectively ) are migratory, moving to the tropics in winter, but races in warmer regions such as the Indian M. m. govinda ( Pariah Kite ), or the Australasian M. m. affinis ( Fork-tailed Kite ), are resident.

* Focke-Wulf Fw 58 Weihe ( Kite ), transport + trainer

Analytic geometry has traditionally been attributed to René Descartes Descartes made significant progress with the methods in an essay entitled La Geometrie ( Geometry ), one of the three accompanying essays ( appendices ) published in 1637 together with his Discourse on the Method for Rightly Directing One's Reason and Searching for Truth in the Sciences, commonly referred to as Discourse on Method.

* Base ( geometry ), a side of a plane figure ( for example a triangle )

* the tetracyanides, < sup > 2 −</ sup > ( M = Ni, Pd, Pt ), which are square planar in their geometry ;

* the dicyanides < sup >−</ sup > ( M = Cu, Ag, Au ), which are linear in geometry.

* Cell ( geometry ), a three-dimensional element, part of a higher-dimensional object

The k-th exterior power of the cotangent space, denoted Λ < sup > k </ sup >( T < sub > x </ sub >< sup >*</ sup > M ), is another important object in differential geometry.

* Chord ( geometry ), a line segment joining two points on a curve

The most observed geometries are listed below, but there are many cases that deviate from a regular geometry, e. g. due to the use of ligands of different types ( which results in irregular bond lengths ; the coordination atoms do not follow a points-on-a-sphere pattern ), due to the size of ligands, or due to electronic effects ( see, e. g., Jahn-Teller distortion ):

In fact, at separations of 10 nm — about 100 times the typical size of an atom — the Casimir effect produces the equivalent of 1 atmosphere of pressure ( 101. 325 kPa ), the precise value depending on surface geometry and other factors.

Before the development of X-ray diffraction crystallography ( see below ), the study of crystals was based on their geometry.

Thus differential geometry may study differentiable manifolds equipped with a connection, a metric ( which may be Riemannian, pseudo-Riemannian, or Finsler ), a special sort of distribution ( such as a CR structure ), and so on.

If the viewing distance is large compared with the separation of the slits ( the far field ), the phase difference can be found using the geometry shown in the figure below right.

Other more recent models are Phaeaco ( implemented by Harry Foundalis ) and SeqSee ( Abhijit Mahabal ), which model high-level perception and analogy-making in the microdomains of Bongard problems and number sequences, respectively, as well as George ( Francisco Lara-Dammer ), which models the processes of perception and discovery in triangle geometry.

Interpreting Euclid's axioms in the spirit of this more modern approach, axioms 1-4 are consistent with either infinite or finite space ( as in elliptic geometry ), and all five axioms are consistent with a variety of topologies ( e. g., a plane, a cylinder, or a torus for two-dimensional Euclidean geometry ).

The earliest recorded beginnings of geometry can be traced to early peoples, who discovered obtuse triangles in the ancient Indus Valley ( see Harappan Mathematics ), and ancient Babylonia ( see Babylonian mathematics ) from around 3000 BC.

Plato ( 427-347 BC ), the philosopher most esteemed by the Greeks, had inscribed above the entrance to his famous school, " Let none ignorant of geometry enter here.

Euclid ( c. 325-265 BC ), of Alexandria, probably a student of one of Plato ’ s students, wrote a treatise in 13 books ( chapters ), titled The Elements of Geometry, in which he presented geometry in an ideal axiomatic form, which came to be known as Euclidean geometry.

The Elements began with definitions of terms, fundamental geometric principles ( called axioms or postulates ), and general quantitative principles ( called common notions ) from which all the rest of geometry could be logically deduced.

Proclus ( 410-485 ), author of Commentary on the First Book of Euclid, was one of the last important players in Hellenistic geometry.

< center > Lambert quadrilateral in hyperbolic geometry </ center >

The fourth angle of a Lambert quadrilateral is acute if the geometry is hyperbolic, a right angle if the geometry is Euclidean or obtuse if the geometry is elliptic.

The summit angles of a Saccheri quadrilateral are acute if the geometry is hyperbolic, right angles if the geometry is Euclidean and obtuse angles if the geometry is elliptic.

In Euclidean geometry, a kite is a quadrilateral whose four sides can be grouped into two pairs of equal-length sides that are adjacent to each other.

In Euclidean geometry, a parallelogram is a simple ( non self-intersecting ) quadrilateral with two pairs of parallel sides.

In Euclidean geometry, a rhombus (◊), plural rhombi or rhombuses, is a simple ( non self-intersecting ) quadrilateral whose four sides all have the same length.

In Euclidean geometry, Brahmagupta's formula finds the area of any cyclic quadrilateral ( one that can be inscribed in a circle ) given the lengths of the sides.

In Euclidean geometry, a cyclic quadrilateral or inscribed quadrilateral is a quadrilateral whose vertices all lie on a single circle.

* Euler centre and maltitudes of cyclic quadrilateral at Dynamic Geometry Sketches, interactive dynamic geometry sketch.

In Euclidean geometry, a convex quadrilateral with at least one pair of parallel sides ( see definition below ) is referred to as a trapezoid in American English and as a trapezium in English outside North America.

The close axiomatic study of Euclidean geometry led to the construction of the Lambert quadrilateral and the Saccheri quadrilateral.

An equidiagonal quadrilateral | equidiagonal kite ( geometry ) | kite that maximizes the ratio of perimeter to diameter, inscribed in a Reuleaux triangle

In geometry, a square is a regular quadrilateral.

* Complete quadrilateral, in projective geometry, a configuration with 4 lines and 6 points

In Euclidean geometry, Ptolemy's theorem is a relation between the four sides and two diagonals of a cyclic quadrilateral ( a quadrilateral whose vertices lie on a common circle ).