What shape has nine sides?

A two-dimensional shape with nine straight sides is called a nonagon. This nine-sided polygon, which also has nine edges or vertices, is also called an enneagon. The term enneagon is preferable, but less popular than the name nonagon because the latter is simpler to spell and pronounce.

The name enneagon is derived from the Greek word enneagonon, which is a combination of two terms that mean nine and corner. The name nonagon, in contrast, has a mixed Roman and Greek origin. It is from the Latin word nonus, which means ninth, added to the suffix gonon. Both enneagon and nonagon are accepted terms to refer to a shape with nine sides.

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Q&A Related to "What shape has nine sides?"
 A shape with 9 sides, is a nonagon. http://wiki.answers.com/Q/What+is+a+shape+with+9+s...
 A cube is six-sided and so is a hexagon. An octagon has eight sides. A one-sided shape is called a henagon. A 13-sided shape is called a triskaidecagon! Good thing we don't use that http://www.ask.com/web-answers/Science/Mathematics...
 The nonagon, also known as an enneagon, is a 9-sided polygon. The name "nonagon" is a prefix hybrid formation, from Latin (nonus, "ninth" + gonon). http://www.kgbanswers.com/what-is-a-shape-with-9-s...
 A Nonagon has 9 sides. Go Geometry! http://www.chacha.com/question/what-is-the-shape-t...
A nine-sided plane figure is called a nonagon or an ennneagon.
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A nine sided polygon is called a nonagon or an enneagon. Nonagon comes has a Latin origin and is a combination of 'ninth' and 'gon. ' Enneagon has a Greek origin ...