A polygon, by definition, is a closed figure. So a closed polygon is an undefined object.
A closed figures is one that has one consistent line making up the figure. There are no openings in the like. Example: a spiral.
Yes, you may think of "closed figure" as part of the definition of a quadrilateral.
the continuous line forming the boundary of a closed geometric figure
is the definition of a polygon.
A closed figure having three sides and three angles
a figure, esp. a closed plane figure, having three or more, usually straight, sides.
A polygon is a closed figure bounded by sides. A triangle is a closed figure bounded by three sides. Therefore, according to the definition of polygon triangle is a polygon.
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Yes, the definition of a polygon is any closed figure with straight sides.
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.
closed figure