Oak

An oak is a tree or shrub in the genus Quercus (/ˈkwɜːrkəs/;Latin "oak tree") of the beech family, Fagaceae. There are approximately 600 extant species of oaks. The common name "oak" may also appear in the names of species in related genera, notably Lithocarpus. The genus is native to the Northern Hemisphere, and includes deciduous and evergreen species extending from cool temperate to tropical latitudes in the Americas, Asia, Europe, and North Africa. North America contains the largest number of oak species, with approximately 90 occurring in the United States. Mexico has 160 species, of which 109 are endemic. The second greatest center of oak diversity is China, which contains approximately 100 species.

Oaks have spirally arranged leaves, with lobate margins in many species; some have serrated leaves or entire leaves with smooth margins. Many deciduous species are marcescent, not dropping dead leaves until spring. In spring, a single oak tree produces both male flowers (in the form of catkins) and small female flowers. The fruit is a nut called an acorn, borne in a cup-like structure known as a cupule; each acorn contains one seed (rarely two or three) and takes 6–18 months to mature, depending on species. The live oaks are distinguished for being evergreen, but are not actually a distinct group and instead are dispersed across the genus.

Oak (RTD)

Oak is an RTD light rail station in Lakewood, Colorado, United States. The station is part of the new W Line which was built as part of the FasTracks expansion. It opened in April, 2013 and is operated by the Regional Transportation District.

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Oak (CTA station)

Oak was a station on the Chicago Transit Authority's North Side Main Line, which is now part of the Brown Line. The station was located at 319 W. Oak Street in the Near North Side neighborhood of Chicago. Oak was situated south of Division, which closed at the same time as Oak, and north of Chicago. Oak opened in 1906 and closed on August 1, 1949, along with 22 other stations as part of a CTA service revision.

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Kite (geometry)

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 contrast, a parallelogram also has two pairs of equal-length sides, but they are opposite to each other rather than adjacent. Kite quadrilaterals are named for the wind-blown, flying kites, which often have this shape and which are in turn named for a bird. Kites are also known as deltoids, but the word "deltoid" may also refer to a deltoid curve, an unrelated geometric object.

A kite, as defined above, may be either convex or concave, but the word "kite" is often restricted to the convex variety. A concave kite is sometimes called a "dart" or "arrowhead", and is a type of pseudotriangle.

Special cases

If all four sides of a kite have the same length (that is, if the kite is equilateral), it must be a rhombus.

If a kite is equiangular, meaning that all four of its angles are equal, then it must also be equilateral and thus a square. A kite with three equal 108° angles and one 36° angle forms the convex hull of the lute of Pythagoras.

Kite (novel)

Kite is a young adult novel about red kites by Melvin Burgess. It contains 15 chapters and was first published in 1997.

When Taylor Mase steal a red kite egg, he is not expecting it to hatch out — but it does. Taylor feels an urge to protect the fragile baby bird, which faces many hazards, including Taylor's own father, a gamekeeper.

Publishing Information

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Kite (disambiguation)

A kite is a type of aircraft.

Kite or kites may also refer to:

Biology

Music

Film

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