A variety of rulers

A 2 meter carpenter's rule

Retractable flexible rule or tape measure

A closeup of a steel rule

A ruler, sometimes called a rule or line gauge, is an instrument used in geometry, technical drawing, printing and engineering/building to measure distances and/or to rule straight lines. Strictly speaking, the ruler is essentially a straightedge used to rule lines^{[citation needed]}, but typically the ruler also contains calibrated lines to measure distances.^[1]

Types[link]

Rulers have long been made of wood in a wide range of sizes. However, they are not all wooden. Plastics have been used since they were invented; they can be molded with length markings instead of being scribed. Metal is used for more durable rulers for use in the workshop; sometimes a metal edge is embedded into a wooden desk ruler to preserve the edge when used for straight-line cutting. 12 inches or 30 cm in length is useful for a ruler to be kept on a desk to help in drawing. Shorter rulers are convenient for keeping in a pocket.^[2] Longer rulers, e.g., 18 inches (45 cm) are necessary in some cases. Rigid wooden or plastic yardsticks, 1 yard long and meter sticks, 1 meter long, are also used. Classically, long measuring rods were used for larger projects, now superseded by tape measure or laser rangefinders.

Desk rulers are used for three main purposes: to measure, to aid in drawing straight lines and as a straight guide for cutting and scoring with a blade. Practical rulers have distance markings along their edges.

A type of ruler used in the printing industry is called a line gauge. These may be made from a variety of materials, typically metal or clear plastic. Units of measurement on a basic line gauge usually include inches, agate, picas, and points. More detailed line gauges may contain sample widths of lines, samples of common type in several point sizes, etc.

Measuring instruments similar in function to rulers are made portable by folding (carpenter's folding rule) or retracting into a coil (metal tape measure) when not in use. When extended for use they are straight, like a ruler. The illustrations on this page show a 2-meter carpenter's rule which folds down to a length of 24 cm to easily fit in a pocket, and a 5-meter-long tape which retracts into a small housing.

A flexible length measuring instrument which is not necessarily straight in use is the tailor's fabric tape measure, a length of tape calibrated in inches and centimeters. It is used to measure around a solid body, e.g., a person's waist measurement, as well as linear measurement, e.g., inside leg. It is rolled up when not in use, taking up little space.

A contraction rule is made having larger divisions than standard measures to allow for shrinkage of a metal casting. They may also be known as a 'shrinkage or shrink rule.^[3]

A ruler software program can be used to measure pixels on a computer screen.

Ruler applications in geometry[link]

In geometry, a ruler without any marks on it (a straightedge) may be used only for drawing straight lines between points, not measuring. A straightedge is also used to help draw accurate graphs in algebra and other math subjects.

A ruler and compass construction refers to constructions using an unmarked ruler and a compass. It is possible to bisect an angle into two equal parts with ruler and compass. It can be proved, though, that it is impossible to divide an angle into three equal parts using only a compass and straightedge — the problem of angle trisection. However, should two marks be allowed on the ruler, the problem becomes solvable.

History[link]

A wooden carpenter's rule and other tools found on board the 16th century carrack Mary Rose.

Rulers made of Ivory were in use by the Indus Valley Civilization period prior to 1500 BC.^[4] Excavations at Lothal (2400 BC) have yielded one such ruler calibrated to about ¹⁄₁₆ in (1.6 mm).^[4] Ian Whitelaw holds that the Mohenjo-Daro ruler is divided into units corresponding to 1.32 in (33.5 mm) and these are marked out in decimal subdivisions with amazing accuracy, to within 0.005 in (0.13 mm). Ancient bricks found throughout the region have dimensions that correspond to these units.^[5]

Anton Ullrich invented the folding ruler in 1851.

Philosophy[link]

Ludwig Wittgenstein famously used rulers as an example in his discussion of language games in the Philosophical Investigations. He pointed out that the standard meter bar in Paris was the criterion against which all other rulers were determined to be one meter long, but that there was no analytical way to demonstrate that the standard meter bar itself was one meter long. It could only be asserted as one meter as part of a language game.

See also[link]

• Dividing engine
• Geometry template
• Golomb ruler
• Measuring rod
• Rolling ruler
• Scale rulers: architect's scale and engineer's scale

References[link]

Notes[link]

Bibliography[link]

• Whitelaw, Ian (2007). A Measure of All Things: The Story of Man and Measurement. Macmillan. ISBN 0-312-37026-1.

External links[link]

Look up ruler in Wiktionary, the free dictionary.

Wikimedia Commons has media related to: Length measuring devices

Kid Cudi
Kid Cudi performing in Denver, Colorado in 2011
Background information
Birth name	Scott Ramon Seguro Mescudi
Born	(1984-01-30) January 30, 1984 (age 28) Cleveland, Ohio, United States
Genres	Alternative hip hop, neo-psychedelia, pop rock
Occupations	Rapper, singer-songwriter, guitarist, actor
Instruments	Vocals, guitar, drums
Years active	2003–present
Labels	GOOD, Universal Republic,[1] Wicked Awesome
Associated acts	WZRD, Dot da Genius, Kanye West, Chip tha Ripper, Ratatat
Website	www.KidCudi.com

Scott Ramon Seguro Mescudi^[2] (born January 30, 1984),^[3] better known by his stage name Kid Cudi ( /ˈkɪd ˈkʌdi/ KID KUD-ee), sometimes stylized KiD CuDi, is an American alternative hip hop recording artist, singer-songwriter, guitarist and actor. He first gained major attention after the release of his debut mixtape A Kid Named Cudi. In 2009, his single "Day 'n' Nite" reached the top five of the Billboard Hot 100 and Hot R&B/Hip-Hop Songs charts. "Day 'n' Nite" was included on Cudi's debut album Man on the Moon: The End of Day, which was later certified Gold. In 2010 he released his second studio album Man on the Moon II: The Legend of Mr. Rager, preceded by the release of two singles "Erase Me" and "Mr. Rager". In October 2010, Cudi announced that he would be forming a rock band with Dot da Genius called 'Wizard', later renamed WZRD. Their self-titled debut album was released on February 28, 2012.^[4] Kid Cudi has sold over 4.6 million digital singles and has worked with Kanye West, Common, David Guetta and other artists signed to the GOOD Music label.^[5]

In 2009 Cudi, along with record producers Patrick "Plain Pat" Reynolds and Emile Haynie launched their record label, Dream On, in partnership with Kanye West's GOOD Music and Universal Motown. On February 26, 2011 Cudi took to his Twitter account to announce that the label had been dissolved due to differences. In April 2011, while performing at New York City’s Roseland Ballroom Kid Cudi announced he was launching his own label: "Wicked Awesome Records".

Biography[link]

1984-2008: Early life and career beginnings[link]

Kid Cudi was born in Cleveland, Ohio and grew up in Shaker Heights and Solon. He is the youngest of four children, with two brothers, Domingo and Dean, and a sister, Maisha.^[6] His father, a house painter, substitute teacher and World War II Air Force veteran was Mexican-Native American, while his mother, a middle-school choir teacher at Roxboro Middle School, in Cleveland Heights, Ohio, is African-American.^[7][8] When he was eleven years old, Mescudi's father died of cancer; his passing would have a significant effect on Mescudi's personality and subsequently his music.^[8] Mescudi attended Shaker Heights High School for two years, then transferred to Solon High School, and later earned his GED. Eventually, Mescudi studied film at the University of Toledo then dropped out after a year.^[6]

It was towards the end of high school that Mescudi first began rapping, inspired by alternative hip hop groups such as The Pharcyde and A Tribe Called Quest.^[8] He moved to Brooklyn in New York City to pursue a music career.^[2] In July 2008, Kid Cudi released his first mixtape, A Kid Named Cudi, in collaboration with New York street-wear brand 10.Deep as a free download.^[9] The mixtape quickly caught the attention of Kanye West, which in turn spawned his signing to GOOD Music later that year.

Kid Cudi was featured on Kanye West's 2008 album, 808s & Heartbreak, singing with West on the track "Welcome to Heartbreak", and helping with songwriting on "Heartless" and "Paranoid". "Welcome to Heartbreak" peaked at #87 on the Pop 100,^[10] and music videos for both songs have been released. Cudi was then tipped as an artist to watch for in media such as Rolling Stone, Vibe, The Source, XXL and BBC News's Sound of 2009 poll of up-and-coming acts.^[11] MTV News also reported on Cudi on a series of reports MCs To Watch In 2009.^[12]

Kid Cudi performing at Central Park Summerstage in New York City, in 2008.

His first television appearance was at the 2008 MTV Video Music Awards, alongside Travis Barker and DJ AM. On February 17, 2009, he appeared on Snoop Dogg's MTV talk show Dogg After Dark performing "Day 'n' Nite" at the end of the show. Two days later on February 19, 2009, Cudi appeared on BET's 106 & Park with Kanye West to debut the video of "Day 'n' Nite". On March 16, 2009 Kid Cudi performed on mtvU's Spring Break special, and the next day he performed three songs on NBC's Last Call with Carson Daly. He has also appeared as a musical guest on The Late Show with David Letterman and Jimmy Kimmel Live!.

Kid Cudi also made a cameo appearance next to Solange in the video for the song "T.O.N.Y." in February 2009, and later in The Black Eyed Peas' video for "I Gotta Feeling", with David Guetta. He has also been on two magazine covers, Complex (August/September 2009) and URB (August 2009). Bape awarded Cudi his own t-shirt in September 2009, in reward for his music and past employment there when living in New York City.

[edit] 2009–2010: Man on the Moon series

Kid Cudi performing on August 6, 2009.

Cudi's debut album Man on the Moon: The End of Day was released on Universal Motown Records on September 15, 2009^[13] and sold 104,419 copies in the first week and charted at #4.^[14] The album's lead single "Day 'n' Nite", Kid Cudi's greatest commercial success thus far, charted well both in the U.S. and in Europe. The second single was "Make Her Say" (originally titled "I Poke Her Face"), which features a sample from Lady Gaga's hit single "Poker Face" and performances by Kanye West and Common.^[15][16]

On February 25, 2009, Cudi self-leaked a "teaser trailer" ^[17] for the upcoming Transformers: Revenge of the Fallen film using his song "Sky Might Fall" in the background, later he posted that he made the trailer himself and was in talks to possibly make it official.^[18]

With Emile Haynie, Cudi produced an exclusive single called "Switchin Lanes" for the video game Midnight Club: Los Angeles, part of its "South Central Premium Upgrade" downloadable content (DLC) which came out March 19, 2009 for the PlayStation 3 and March 27, 2009 for the Xbox 360.^[19]

He revealed information about his future plans via his blog, saying that a possible collaboration with Chip tha Ripper could be followed with a collaboration project with electrorock duo Ratatat.^[20] During the summer of 2009, Cudi joined rapper Asher Roth for the Great Hangover concert tour.^[21] Kid Cudi was featured on the highly anticipated Jay-Z album The Blueprint 3 (2009), on the song "Already Home".^[22] In a late 2009 interview, Cudi announced that the follow-up to his debut album will be a collaboration album called Cudder and the Revolution of Evolution. He stated he has already recorded songs with Snoop Dogg, Travis Barker, Clipse, Cage and Pharrell and would also like to work with Drake, Green Day, Kings of Leon, Robin Thicke, The Killers and The Postal Service on the album. Also it was rumored that Man on the Moon: The End of Day will be followed up by a sequel titled Man on the Moon: The Ghost in the Machine and that the Man on the Moon will be a trilogy, but was not been confirmed.^[23] Kid Cudi was nominated for three 2010 Grammy Awards for his singles, "Day 'n' Nite" and "Make Her Say".^[24] Kid Cudi was featured on Snoop Dogg's re-release of Malice n Wonderland, More Malice (2010), on the song "That Tree",^[25] as well as teaming up with Johnny Polygon to remix Polygon's "The Riot Song" which appears on his mixtape, Rebel Without Applause(2010)^[26] On April 20, 2010, Kid Cudi announced that the name of his second album has been changed from Cudder and the Revolution of Evolution to Man on the Moon II: The Legend of Mr. Rager.^[27][28] On June 11, 2010, Kid Cudi was arrested in the Chelsea neighborhood of the Manhattan borough New York City and charged with felony criminal mischief and possession of a controlled substance.^[29] Despite his arrest, he was released and made it to Manchester, Tennessee in time to play at Bonnaroo.

The lead single for Cudi's second studio album titled "Erase Me" featuring Kanye West and produced by Jim Jonsin, debuted on a Cleveland radio station June 30, 2010 and was officially released to Rhythm/Crossover radio on August 17, 2010.^{[30][31][32][33]} The album debuted at number three on the US Billboard 200 chart, with first-week sales of 169,000 copies.^[34] In its second week it crossed the 200,000 sales mark.^[35] 2010 also featured Kid Cudi on a number of songs for Kanye West's weekly free music giveaway G.O.O.D. Fridays appearing on "Good Friday", "Christian Dior Denim Flow" and "The Joy", which later became a bonus track on Jay-Z and Kanye West collaborative effort Watch the Throne (2011).

2011-present: New direction and WZRD[link]

In October 2010, Cudi announced that he would be forming a rock band with Dot da Genius tentatively called 'Wizard'.^[36] However, in early 2011, he announced that he would be releasing a mixtape prior to the rock album.^[37] On February 26, 2011 Cudi took to his Twitter account to announce that Dream On, the record label he launched back in 2009 with partners Patrick “Plain Pat” Reynolds and producer Emile Haynie, has been dissolved.^[38] However in an interview with Complex Magazine he explained they were still on good terms: "I wanted to try something new, and I wanted to take control of things myself. Those are still my guys, Pat and Emile, and I'm still going to work with them in the future. When we start working on Man on the Moon III I’ll be calling them up to see if they want to be a part of it. I know Emile is definitely down. We had an issue, but we’re men and we were able to figure it out and move forward. There’s no hard feelings."^[39]

In March 2011, Cudi announced that a music video for "Marijuana" will be released in the spring,^[40] followed by a music video for "Mr. Rager" in the summer of 2011.^[40] As well as a short film inspired by his song "Maniac" with Cage, directed by Shia LaBeouf^[41] will be released in October 2011.^{[dated info][40]}

In April 2011, while performing at New York City’s Roseland Ballroom Kid Cudi announced name of the record label he is launching. The new label, which he will be releasing his third studio album on is called “Wicked Awesome Records”. He also renamed his band on the same occasion to '2 Be Continuum' renaming it from the original 'Wizard'. Kid Cudi explained his reasoning saying: "I needed something more original, something different, but it’s still wizardry at its finest."^[42] On August 12, 2011, Kid Cudi released the music video for "No One Believes Me", directed by Fright Night director Craig Gillespie. Although the song was recorded as a collaborative song with Dot da Genius, the single was released under Kid Cudi's name.^[43] On August 21, Cudi announced that he is no longer releasing the mixtape A Man Named Scott so that he can focus on his rock project and his third solo album Man on the Moon III.^[44] Kid Cudi released a video for Man on the Moon II: The Legend of Mr. Rager's title track "Mr. Rager" on September 8, 2011. The video has received all-positive reviews from critics and fans alike.^[45]

Despite saying he will not do many more features for other artists in Complex magazine's October/November 2011 cover story,^[46] he appeared on Bryan Greenberg's second studio album We Don't Have Forever (2011), Travis Barker's Give the Drummer Some (2011), The Knux's Eraser (2011), and Wale's Ambition (2011) respectively.

On October 30, Cudi released the Maniac, a short horror film co-starring Cage and directed by Shia LaBeouf, through his blog.^[47]

On November 13, 2011, a previously unreleased mixtape of material Cudi had recorded from 2002-2003 titled Rap Hard was released. On November 18, 2011 renamed his band, for the second time to 'WZRD'.^[48] He also announced that the upcoming rock project will be released on his 28th birthday, January 30, 2012.

In late 2011, Cudi was mentioned in a viral video by Ben Breedlove about his near death experiences.^[49] After Breedlove's death on December 26, 2011, Cudi commented on his thoughts about inspiring the young kid. "I am so sad about Ben Breedlove," Kid Cudi wrote on his Tumblr blog. "I watched the video he left for the world to see, and him seeing me in detail, in his vision really warmed my heart. I broke down, I am to tears because I hate how life is so unfair. This has really touched my heart in a way I cant describe, this is why I do what I do. Why I write my life, and why I love you all so much. Life is really f---- up sometimes, but I know Ben is at Peace, and I hope he gets a chance to sit and talk with my Dad. We love you Ben. Forever. Thank you for loving me. To Ben’s family, you raised a real hero, he’s definitely mine. You have my love."

In January 2012 Cudi appeared on two songs off Chip tha Ripper's mixtape Tell Ya Friends, "Ride 4 You" which also featured Far East Movement and "GloryUs" which credited the duo as they are collectively known, The Almighty GloryUs, which led to speculation that a project from the two was underway. On January 31, Cudi announced through his Twitter feed that he had completed Man on the Moon III and that his next album was the collaborative effort with Chip tha Ripper.^[50] In 2012 Cudi was featured on the soundtrack to the film The Hunger Games, crafting an original song for the film titled "The Ruler and the Killer". Cudi wrote on Twitter, "I could not have done it with out my producing partners on the project for the film, The legendary and Godly T Bone Burnett and Greg Wells!", referring to "The Ruler and the Killer"^[51]

While working on WZRD, Cudi claims he had writer's block for almost 5 months because of his new sobriety. Something that never has happened to him for such an extended period of time. According to Kid Cudi, bands that inspired the album include Electric Light Orchestra, Jimi Hendrix, Nirvana and Pink Floyd. The album includes a song titled "Where Did You Sleep Last Night?", a cover of the same titled song by Nirvana who in turn was inspired by blues guitar legend Lead Belly's rendition of the traditional folk song.^[52]

Acting career[link]

Kid Cudi starred in the new HBO comedy series How to Make It in America until its cancellation after 2 seasons. He is credited under his real name.^[53]

Personal life[link]

On March 26, 2010, his daughter, Vada Wamwene Mescudi, was born.^[54][55]

Discography[link]

Studio albums

• Man on the Moon: The End of Day (2009)
• Man on the Moon II: The Legend of Mr. Rager (2010)
• Man on the Moon III (2012)^[56]

Collaborative albums

• WZRD (2012) (with Dot da Genius as WZRD)^[37]
• Cruel Summer (2012) (with GOOD Music)^[57]
• The Almighty GloryUS (TBA) (with Chip tha Ripper)

Mixtapes

• A Kid Named Cudi (2008)

Awards and nominations[link]

Filmography[link]

References[link]

External links[link]

Wikimedia Commons has media related to: Kid Cudi

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