A fivesided polygon, with five vertices and five angles, is called a pentagon. The word pentagon is derived from the Greek words "pente" and "gonia," which mean "five" and "angle."
If a pentagon consists of equal sides and equal angles, it is referred to as a regular pentagon; otherwise, it is called an irregular pentagon. The interior angles of a regular polygon measure 108 degrees. A pentagon consists of five straight, connected sides. If one of the five sides of a given shape is a curved line or if the fivesided shape is not a closed figure, then it is not a pentagon.
pentagon
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The name of a 119 sided polygon is Tetraenneatetragon.
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a nine sided polygon is called a nonagon.
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The term for a foursided polygon is quadrilateral . Examples of quadrilaterals are: Rectangle Quadrangle Parallelogram Square Rhombus Trapezoid (or Trapezium in UK) Kite
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