# What is a shape with 9 sides called?

## What is a shape with 9 sides called?

The word nonagon comes from the Latin word “nona”, meaning nine, and “gon”, meaning sides. So it literally means “nine sided shape”. Nonagons are also called enneagon, which comes from the Greek word “enneagonon”, which means “nine corners”.

### What is the measure of a 9 sided polygon?

Excellent! So the interior angle of a 9 -sided polygon is 140 ° . We can see that x and one interior angle lie on the same side of a straight line, so their sum must be 180 ° . So x = 180 ° − 140 ° , or x = 40 ° .

#### How many sides does a 9 sided polygon have?

2D Shapes

Triangle – 3 Sides Square – 4 Sides
Pentagon – 5 Sides Hexagon – 6 sides
Heptagon – 7 Sides Octagon – 8 Sides
Nonagon – 9 Sides Decagon – 10 Sides
More …

What is a 1 trillion sided shape called?

Regular megagon
Megagon

Regular megagon
Coxeter diagram
Symmetry group Dihedral (D1000000), order 2×1000000
Internal angle (degrees) 179.99964°
Dual polygon Self

What is an eighteen sided shape called?

In geometry, an octadecagon (or octakaidecagon) or 18 – gon is an eighteen – sided polygon .

## How many triangles are in a 9 sided polygon?

N Triangles with 3 diagonal endpoints Total Number of Triangles
6 20 110
7 35 287
8 56 632
9 84 1302

### What’s a 13 sided shape called?

Tridecagon
A 13-sided polygon, sometimes also called the triskaidecagon.

#### What is 10 sided shape called?

decagon
In geometry, a decagon (from the Greek δέκα déka and γωνία gonía, “ten angles”) is a ten-sided polygon or 10-gon. The total sum of the interior angles of a simple decagon is 1440°. A self-intersecting regular decagon is known as a decagram.

Is there a shape with 11 sides?

In geometry, a hendecagon (also undecagon or endecagon) or 11-gon is an eleven-sided polygon.

What is a 100 sided shape called?

Hectogon
In case of two dimensional shapes, a shape with 100 sides is called Hectogon. A polygon with seven sides is called a heptagon.

## How many degrees is in a 9 sided shape?

Each angle of a regular nonagon is of 140°. A nonagon in which all sides are not equal and all angles are not equal. The measure of its angles are different but total sum of all its interior angles is always 1260°.

### Which polygon has the most sides?

Types Of Regular Polygons A triangle that has all sides and angles the same is called an equilateral triangle, or regular triangle. A quadrilateral that has all sides and angles the same is called a square, or regular quadrilateral. A pentagon that has all sides and angles the same is known as a regular pentagon.

sides – Triangle