Q:

What shape has nine sides?

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Quick Answer

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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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 shape with nine sides.

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  • Q:

    What is a nine-sided polygon?

    A:

    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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  • 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 is a two-dimensional shape?

    A:

    A two-dimensional shape is a shape that has width and length but no depth. Another term for a two-dimensional shape is a plane shape, because a two-dimensional shape occurs on one plane, a flat surface that extends in every direction.

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  • Q:

    How many sides does a nonagon have?

    A:

    A nonagon, also called an enneagon, is a polygon with nine sides. The name comes partially from the Latin word for ninth, "nonus."

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