A circle is not a polygon, because it is not made of up straight line segments, but one curved line.

www.reference.com/math/circle-polygon-9ac0da938b74d1c7

A circle is not a polygon because it does not conform to the definition of a
polygon. The definition of a polygon is a closed figure formed by straight lines or
...

mathforum.org/library/drmath/sets/select/dm_circle_polygon.html

Could a circle be considered a polygon with an infinite number of sides?
Polygons, Infinite Sides, and Circles: Can a regular polygon with an infinite
number of ...

mathforum.org/library/drmath/view/55097.html

A circle is not a polygon. ... a Polygon? Date: 03/07/99 at 21:25:33 From: Tyler
Coffman Subject: Is a circle a polygon? Is a circle a polygon? Please help me.

www.quora.com/Is-the-circle-considered-a-polygon

No. A circle can be viewed as a limit of polygons, but it is not itself a polygon ...
circumference, it can't be described as a polygon. Logically : Yes(Implication).

www.mathsteacher.com.au/year7/ch09_polygons/05_polygon/pol.htm

A circle is not a polygon as it does not have straight sides. Circle. Polygons ... If a
polygon has no reflex angle, then it is said to be a convex polygon. Examples of ...

www.ask.com/youtube?q=Is a Circle a Polygon Yes or No?&v=7eHl_l9CF9o

Dec 17, 2012 ... Circle is a polygon or not is a difficult question in Mathematics. Let us have a
logic which shows that a circle is not a polygon.

www.quirkyscience.com/circle-a-polygon/

Jun 15, 2015 ... Does a circle have zero sides and corners, or an infinite number of sides ... never
be derived by the method of limits. Is the circle a polygon? No.

math.stackexchange.com/questions/1164977/how-to-prove-the-infinite-number-of-sides-in-a-circle

Feb 25, 2015 ... Thus if a circle is a polygon with an infinite number of sides it's external angles
would ..... @columbus8myhw Yes I could get into that I suppose.

www.physicsforums.com/threads/circles-vs-an-infinitely-n-sided-polygon.743507/

What, exactly, distinguishes this infinitely sided polygon from a circle? ... So, in
the limit as the number of sides goes to infinity, the polygon IS ...