Q:

What is a nine-sided polygon?

A:

Quick Answer

A nine-sided polygon is commonly called a nonagon. This polygon, which 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, according to Wolfram MathWorld.

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Full Answer

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 polygon with nine sides.

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Related Questions

  • Q:

    What is a nine-sided shape called?

    A:

    A nonagon is a closed shape that has nine sides. If it is a regular nonagon, all nine sides are the same length, and all the angles are equal.

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  • Q:

    What shape has nine sides?

    A:

    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.

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  • Q:

    What is an 11-sided polygon?

    A:

    An 11-sided polygon is called a hendecagon. In order for an 11-sided shape to be considered a hendecagon, its sides must all be straight and form a closed shape.

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  • Q:

    What is a seven-sided polygon called?

    A:

    A seven-sided polygon is called a "heptagon." "Hepta-" or "hept-" is a prefix from the Greek word meaning "seven." In addition to having seven sides, the heptagon also has seven angles where the sides meet.

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