# Question: Can A Polygon Have An Open Side?

## How many sides does a polygon have?

2D ShapesTriangle – 3 SidesSquare – 4 SidesPentagon – 5 SidesHexagon – 6 sidesHeptagon – 7 SidesOctagon – 8 SidesNonagon – 9 SidesDecagon – 10 SidesMore ….

## Can a polygon be an open shape?

Polygons can be classified as open or closed. A polygon is open when the segments do not all connect at the beginning and end. That is, if we draw the polygon starting at one point, we finish drawing at a different point.

## What’s a 13 sided shape called?

tridecagonIn geometry, a tridecagon or triskaidecagon or 13-gon is a thirteen-sided polygon.

## What are the 20 kinds of polygons?

Terms in this set (18)Three. Trigon or Triangle.Four. Tetragon or Quadrilateral.Five. Pentagon.Six. Hexagon.Seven. Heptagon.Eight. Octagon.Nine. Nonagon or Enneagon.Ten. Decagon.More items…

## Does a polygon have to be closed?

Polygons. A polygon is any closed, 2-dimensional figure that is made entirely of line segments that intersect at their endpoints. Polygons can have any number of sides and angles, but the sides can never be curved.

## What is not a regular polygon?

An irregular polygon is any polygon that is not a regular polygon. It can have sides of any length and each interior angle can be any measure. They can be convex or concave, but all concave polygons are irregular since the interior angles cannot all be the same.

## Why is a cube not a polygon?

A polygon is a two dimensional figure that can be drawn on a flat surface. A cube is a three dimensional figure that can be sculpted in three dimensions but can only have projections of it drawn on a flat surface. So a cube is not a polygon.

## What is the side of polygon?

The segments of a polygonal circuit are called its edges or sides, and the points where two edges meet are the polygon’s vertices (singular: vertex) or corners. The interior of a solid polygon is sometimes called its body. An n-gon is a polygon with n sides; for example, a triangle is a 3-gon.

## Can a polygon have 2 sides?

In geometry, a digon is a polygon with two sides (edges) and two vertices. … A regular digon has both angles equal and both sides equal and is represented by Schläfli symbol {2}.

## How do you know if a shape is not a polygon?

A figure or shape is not considered a polygon if it has rounded sides or if its sides intersects at any place other than at the ends of each side. Therefore a circle is not a polygon and an hourglass shape is not a polygon.

## What is the difference between a polygon and a regular polygon?

Answer and Explanation: A polygon has three or more sides. If all sides are the same length, the polygon and all the angles are convex, it is termed regular. If not, then it is an irregular polygon. An example of a regular octagon is a STOP sign.

## Is a rhombus always an irregular polygon?

A regular polygon must be equilateral (all of its sides are the same length) and equiangular (all of its angles are the same measure). A rhombus is equilateral: all of its sides are of the same length. … A rhombus can never be a regular polygon because it is not equiangular.

## What is eleven sided polygon called?

HendecagonIn geometry, a hendecagon (also undecagon or endecagon) or 11-gon is an eleven-sided polygon. (The name hendecagon, from Greek hendeka “eleven” and –gon “corner”, is often preferred to the hybrid undecagon, whose first part is formed from Latin undecim “eleven”.)

## What is an open shape called?

In geometry, an open shape can be defined as a shape or figure whose line segments and/or curves do not meet. They do not start and end at the same point. Here are some examples of open shapes.

## What is a 100 sided shape called?

hectogonIn geometry, a hectogon or hecatontagon or 100-gon is a hundred-sided polygon. The sum of all hectogon’s interior angles are 17640 degrees.

## What is a 6 sided shape called?

hexagonA five-sided shape is called a pentagon. A six-sided shape is a hexagon, a seven-sided shape a heptagon, while an octagon has eight sides…

## What’s a 12 sided shape called?

dodecagonIn geometry, a dodecagon or 12-gon is any twelve-sided polygon.

## What is a 9 sided shape called?

enneagonIn geometry, a nonagon (/ˈnɒnəɡɒn/) or enneagon (/ˈɛniəɡɒn/) is a nine-sided polygon or 9-gon. The name nonagon is a prefix hybrid formation, from Latin (nonus, “ninth” + gonon), used equivalently, attested already in the 16th century in French nonogone and in English from the 17th century.