An octogon would fit that description.
Origin
Ice cream flavors starting with O include: Oreo Orange Oh Henry
Otto
overwhelming, outrageous, outstanding
slow
If you're asking if a circle is a polygon the answer in , No.
Only one polygon has a name starting with the letter "a". It is called the "Apeirogon", and it is a polygon with infinite sides.
A regular pentagon has straight sides and is closed so its a polygon. Any shape with straight sides and is closed is a polygon. Example O (circle) has curved lines so its not a polygon L (square) is open therefore it is not a polygon.
That's not necessarily true. An octagon is an eight-sided polygon with two 'o's
yes there is a invention starting with o oil oven
insects starting with letters O X and Z
O
tetragon (a four sided polygon)three dimensionaltriangletrapezoid
Origin
Some six letter words starting with O are:objectoblongoccultocelotoddityoffendofficeorangeorioleorphanoverdooxygen
Starting with the definition of polygon makes much easier to understand why triangle is a polygon.Definition: A polygon is a closed figure bounded by sides.Definition of triangle: Triangle is a closed figure bounded by three sides.Since triangle is also a closed figure bounded by sides therefore, triangle is a polygon.
A few examples of 3-letter words starting with the letter O are:owloweoaroatown