## What’s a 9 sided shape?

nonagon
List of n-gons by Greek numerical prefixes
SidesNames
7heptagonseptagon
8octagon
9enneagonnonagon
10decagon

## How many triangles does a nonagon have?

A regular nonagon has up to 9 congruent triangles that do not overlap.

## How many equal sized angles does a nonagon have?

A regular nonagon shape has 9 equal sides and 9 congruent angles. In a regular nonagon, each interior angle measures 140° .

## How many vertices have a nonagon?

9
Nonagon/Number of vertices

## Is a nonagon a 9 sided shape?

In 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.

## Is a nonagon concave or convex?

No line containing any of the sides will pass through the interior of the quadrilateral, so it is convex. Example 1a: There are 9 sides, so this is a nonagon. A line containing some of the sides will pass through the interior of the nonagon, so it is concave.

## What are the 9 sides of a nonagon?

A nine sided shape is a polygon called a nonagon. It has nine straight sides that meet at nine corners. The word nonagon comes from the Latin word “nona”, meaning nine, and “gon”, meaning sides. So it literally means “nine sided shape”.

## What is the sum of a nonagon?

1260°
For example, a regular nonagon has 9 sides. From the formula, the sum of the angles is (9 – 2)*180° = 7*180° = 1260°. Divided by 9, this is 1260°/9 = 140° so each angle in a regular nonagon has 140°.

## What is dodecagon shape?

A dodecagon is a 12-sided polygon. … In particular, a dodecagon with vertices equally spaced around a circle and with all sides the same length is a regular polygon known as a regular dodecagon.

## How does a Heptagon look like?

The heptagon shape is a plane or two-dimensional shape comprised of seven straight sides, seven interior angles, and seven vertices. A heptagon shape can be regular, irregular, concave, or convex. … All heptagons can be divided into five triangles. All heptagons have 14 diagonals (line segments connecting vertices)

## How many lines of symmetry does a nonagon have?

9
Nonagon/Line of symmetry
A regular nonagon has 9 lines of symmetry and a rotational symmetry of order 9, meaning that it can be rotated in such a way that it will look the same as the original shape 9 times in 360°. Nine 40° of rotation about the center.

## What is a Icosagon shape?

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

## Where did the word Dodecagon originate?

English word dodecagon comes from English -gon, English dodeca- (Twelve.)

## What is an 11gon?

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 are examples of dodecagon?

A polygon with 12 sides is known as a dodecagon. Therefore, figure (a) is a dodecagon. Example 2: There is an open park in the shape of a regular dodecagon.