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

References

Kite (disambiguation)

A kite is a type of aircraft.

Kite or kites may also refer to:

Biology

Music

Film

Ships

RAS

RAS or Ras may refer to:

People and titles

Locations

Societies and groups

Ras subfamily

Ras is a family of related proteins which is ubiquitously expressed in all cell lineages and organs. All Ras protein family members belong to a class of protein called small GTPase, and are involved in transmitting signals within cells (cellular signal transduction). Ras is the prototypical member of the Ras superfamily of proteins, which are all related in 3D structure and regulate diverse cell behaviours.

When Ras is 'switched on' by incoming signals, it subsequently switches on other proteins, which ultimately turn on genes involved in cell growth, differentiation and survival. As a result, mutations in ras genes can lead to the production of permanently activated Ras proteins. This can cause unintended and overactive signaling inside the cell, even in the absence of incoming signals.

Because these signals result in cell growth and division, overactive Ras signaling can ultimately lead to cancer. The 3 Ras genes in humans (HRas, KRas, and NRas) are the most common oncogenes in human cancer; mutations that permanently activate Ras are found in 20% to 25% of all human tumors and up to 90% in certain types of cancer (e.g., pancreatic cancer). For this reason, Ras inhibitors are being studied as a treatment for cancer, and other diseases with Ras overexpression.

RAS (musician)

Nicholas Furlong (born September 16, 1986), professionally known as RAS, is an American singer, musician, songwriter, and record producer. Furlong's work is noted to cross many musical genres, ranging from pop, rock, and hip hop, to electro house and dance music. He has had many chart successes both in America and internationally.

Early life

Furlong was raised in Carson City, Nevada. A self-taught musician, he began writing music at the age of twelve. As a teenager, he started recording his own songs and sharing them on various music sites. While still a junior in high school, his music was discovered by a music director at Midway Games, who offered him an opportunity to write songs for video games. Furlong contributed to various game soundtracks between the years of 2004-2005. At the age of twenty he moved to Los Angeles to pursue a career as a songwriter and producer. Through networking and word of mouth, he met and began working with various other songwriters and producers.