A decagon can be defined as a polygon having ten sides, ten interior angles and ten vertices.

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## How many sides a regular decagon has?

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.

## How many sides are there in regular dodecagon?

A dodecagon is a 12-sided polygon. Several special types of dodecagons are illustrated above. 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 many angles does a regular decagon have?

A decagon is a polygon that is easily identified by one key trait – it’s a 10 side shape with ten interior angles and ten vertices.

## Does a decagon have 10 equal sides?

A regular decagon has 10 equal-length sides and equal-measure interior angles. Each angle measures 144° and they all add up to 1,440° . An irregular decagon has sides and angles that are not all equal or congruent. A convex decagon bulges outward, with no interior angle greater than 180° .Jun 19, 2019

## What polygon that has 11 sides?

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 shape has 7 sides called?

A heptagon is a seven-sided polygon. It is also sometimes called a septagon, though this usage mixes a Latin prefix sept- (derived from septua-, meaning “seven”) with the Greek suffix -gon (from gonia, meaning “angle”), and is therefore not recommended.

## What is a shape with 20 sides called?

The icosahedron – 20-sided polyhedron – is frequent. Most often each face of the die is inscribed with a number in Greek and/or Latin up to the number of faces on the polyhedron.

## What is a shape with 13 sides called?

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

## What’s a 15 sided shape called?

In geometry, a pentadecagon or pentakaidecagon or 15-gon is a fifteen-sided polygon.

## What is a regular decagon?

Decagons can be categorized as regular and irregular. A regular decagon is a decagon with all sides equal in length and all the angles equal in measure. In a regular decagon, the interior angles add up to 1440 degrees, and the exterior angles add up to 360 degrees.

## What type of shape has 8 sides?

In simple words, the octagon is an 8-sided polygon, also called 8-gon, in a two-dimensional plane. A regular octagon will have all its sides equal in length. Each interior angle of a regular octagon is equal to 135°. Therefore, the measure of exterior angle becomes 180° – 135° = 45°.

## What’s the name of a shape with 4 sides?

A quadrilateral is a 4 sided closed figure. These figures are quadrilaterals: A shape with four sides. The shape has one set of parallel sides and does not have any right angles.

## What is a 10 sided shape called?

A decagon is a closed shape with ten sides and ten angles.

## What is a 9 sided shape called?

1. A nonagon is also called enneagon, which is derived from a Greek word called enneagonon, which means nine corners. 2. The first use of the word nonagon dates back to the early 17th century, and has a Latin prefix (nona) and a Greek suffix (gon), making it a polygon with nine sides and nine angles.

## What is a shape with 100 sides called?

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

## What is a 5 sided shape called?

A pentagon is a shape with 5 sides and 5 angles. An octagon is a shape with 8 sides and 8 angles. A trapezoid is a quadrilateral with one set of parallel sides.

## What is a 5 shape?

A pentagon is a geometrical shape, which has five sides and five angles. Here, “Penta” denotes five and “gon” denotes angle.

## What is not a polygon?

A circle is not a polygon. Since, a polygon is a closed curve made up of only line segments.

## What is a 50 sided shape called?

Name of 50 sided polygon:

In geometry, a 50 sided shape is called a Pentacontagon.

## What is a shape with 40 sides called?

A tetracontagon or 40-gon is a shape with 40 sides and 40 corners.

## What is the hardest shape?

There are several shapes that are used when strength is important. The arc (think: circle) is the strongest structural shape, and in nature, the sphere is the strongest 3-d shape. The reason being is that stress is distributed equally along the arc instead of concentrating at any one point.

## What is a 17 sided shape called?

to 17, forming the heptadecagon.

## What is a shape with 30 sides called?

In geometry, a triacontagon or 30-gon is a thirty-sided polygon. The sum of any triacontagon’s interior angles is 5040 degrees.

## What is an 18 sided shape called?

An 18-sided polygon, sometimes also called an octakaidecagon.

## What kind of polygon has 6 sides?

In geometry, a hexagon can be defined as a closed two-dimensional polygon with six sides. Hexagon has 6 vertices and 6 angles also. Hexa means six and gonia means angles.

## Is a decagon a regular polygon?

A decagon can be recognized as a polygon with 10 sides, 10 interior angles, and 10 vertices. Decagon can be regular and irregular. Regular decagon has all equal sides.

## What is a 20 sided shape called?

The icosahedron – 20-sided polyhedron – is frequent. Most often each face of the die is inscribed with a number in Greek and/or Latin up to the number of faces on the polyhedron.

## What is a 9 sided shape called?

1. A nonagon is also called enneagon, which is derived from a Greek word called enneagonon, which means nine corners. 2. The first use of the word nonagon dates back to the early 17th century, and has a Latin prefix (nona) and a Greek suffix (gon), making it a polygon with nine sides and nine angles.

## What is the 10 sided shape?

A decagon is a polygon that is easily identified by one key trait – it’s a 10 side shape with ten interior angles and ten vertices.

## What type of shape has 8 sides?

In simple words, the octagon is an 8-sided polygon, also called 8-gon, in a two-dimensional plane. A regular octagon will have all its sides equal in length. Each interior angle of a regular octagon is equal to 135°. Therefore, the measure of exterior angle becomes 180° – 135° = 45°.