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# What is 9 sided shape called?

Last Updated: 11th April, 2021

In geometry, a nonagon (/ˈn?n?g?n/) or enneagon (/ˈ?ni?g?n/) 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.

In this regard, what is a 10 sided shape called?

In geometry, a decagon is a ten-sided polygon or 10-gon.

Also, what is a 7 sided shape called? In geometry, a heptagon is a seven-sided polygon or 7-gon. The heptagon is sometimes referred to as the septagon, using "sept-" (an elision of septua-, a Latin-derived numerical prefix, rather than hepta-, a Greek-derived numerical prefix; both are cognate) together with the Greek suffix "-agon" meaning angle.

Also to know is, what is an 11 sided shape called?

In 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 a 21 sided shape called?

Greek for 21: Είκοσι καί ένα (Icosi kai hena = Twenty and one), but also just: Είκοσι ένα (Icosi hena = Twenty one). A polygon with 21 sides is therefore called a: Icosikaihenagon, but also a Icosihenagon.

Professional

## What is a 20 Gon?

In geometry, an icosagon or 20-gon is a twenty-sided polygon. The sum of any icosagon's interior angles is 3240 degrees.

Professional

## Is Star a polygon?

Yes, a star is a polygon. In geometry, a star is a special type of polygon that we call a star polygon. These types of polygons take on the general

Professional

## Is circle a polygon?

Polygons. A polygon is a closed plane figure with three or more sides that are all straight. The following figure is not a polygon as it is not a closed figure. A circle is not a polygon as it does not have straight sides.

Explainer

## What is a 14 Gon?

In geometry, a tetradecagon or tetrakaidecagon or 14-gon is a fourteen-sided polygon.

Explainer

## Is a trapezoid a polygon?

A trapezoid is a four-sided shape with at least one set of parallel sides. Finally, a polygon is a closed, two-dimensional shape with many sides. Everything from a triangle to an octagon to a megagon is a type of polygon.

Explainer

## Can a polygon have curved sides?

No. A polygon by definition has straight line segments as its sides. If a geometrical figure has curved sides, it is not considered a polygon. A regular polygon has an interior angle that is twice the exterior angle.

Pundit

## Is there a shape with 2 sides?

In geometry, a digon is a polygon with two sides (edges) and two vertices. Its construction is degenerate in a Euclidean plane because either the two sides would coincide or one or both would have to be curved; however, it can be easily visualised in elliptic space.

Pundit

## Is a cross a polygon?

A polygon is a closed figure, formed by segments, and its sides do not cross.

Pundit

## What do you call a 12 sided polygon?

Convex, cyclic, equilateral, isogonal, isotoxal. In geometry, a dodecagon or 12-gon is any twelve-sided polygon.

Pundit

## What is a 12 sided dice called?

Rhombo-triangular- In geometry, a dodecahedron (Greek δωδεκάεδρον, from δώδεκα dōdeka "twelve" + ?δρα hédra "base", "seat" or "face") is any polyhedron with twelve flat faces. The most familiar dodecahedron is the regular dodecahedron, which is a Platonic solid.

Pundit

## What do you call a 13 sided polygon?

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

Teacher

## What is a 19 sided polygon?

In geometry an enneadecagon or 19-gon is a nineteen-sided polygon. It is also known as an enneakaidecagon or a nonadecagon.

Supporter

## What are all the Gons?

Here is a list of polygon names depending on the number of sides they have, starting with three and ending with ten. 3 sides - Triangle. 4 sides - Quadrilateral. 5 sides - Pentagon. 6 sides - Hexagon.

Supporter

## What is Heptagon shape?

A polygon is an enclosed two-dimensional shape with straight sides. A heptagon is a seven-sided polygon. Along with seven sides, a heptagon has seven vertices and angles. A regular heptagon is a heptagon that has congruent sides and angles.

Supporter

## How do you identify a polygon?

A polygon is any 2-dimensional shape formed with straight lines. Triangles, quadrilaterals, pentagons, and hexagons are all examples of polygons. The name tells you how many sides the shape has. For example, a triangle has three sides, and a quadrilateral has four sides.

Beginner

## What are the 20 polygons?

Names of Polygons
Name Sides Interior Angle
Octakaidecagon 18 160°
Icosagon 20 162°

Beginner

## What is a 4 sided shape called?

A quadrilateral is a four-sided polygon with four angles. There are many kinds of quadrilaterals. The five most common types are the parallelogram, the rectangle, the square, the trapezoid, and the rhombus. Move your mouse cursor over the figures at the right to learn more.

Beginner

## What is a 20 sided 3d shape called?

ICOSAHEDRON. Make a paper icosahedron. An icosahedron is a twenty-sided regular geometric solid composed of equilateral triangles. Match Each Regular Polyhedron to Its Name and Its Unfolded Form. Draw lines between each Platonic solid (regular polyhedron), its name, and its unfolded form.

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11th April, 2021

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