## What are the 20 kinds of polygon?

Polygons: How Many Sides?

3 | triangle, trigon |
---|---|

17 | heptadecagon |

18 | octadecagon |

19 | enneadecagon |

20 | icosagon |

**What is a regular 20 sided polygon?**

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

### What are the 20 kinds of polygons 1 20?

Terms in this set (20)

- henagon (monogon)
- digon.
- triangle.
- quadrilateral.
- pentagon.
- hexagon.
- heptagon.
- octagon.

**How many triangles are there in a regular polygon of 20 sides?**

N | Triangles with 3 diagonal endpoints | Total Number of Triangles |
---|---|---|

17 | 680 | 53516 |

18 | 816 | 73404 |

19 | 969 | 101745 |

20 | 1140 | 136200 |

#### How many regular polygons are there?

The sum of the angles of a n-gon is (in degrees) 180*n-360. An angle of a regular n-gon is (180*n-360)/n = 180–360/n. This number is an integer when n is a factor of 360. Hence 22 regular polygons are possible in which the measures of the interior angles, in degrees, are integers.

**What is a polygon with 4 sides?**

Definition: A quadrilateral is a polygon with 4 sides.

## How many diagonals does a 20 sided polygon have?

170 diagonals

Therefore, for a 20-sided polygon, there will be 190 lines and 170 diagonals.

**What polygon has 17 sides?**

heptadecagon

In geometry, a heptadecagon, septadecagon or 17-gon is a seventeen-sided polygon….Heptadecagon.

Regular heptadecagon | |
---|---|

A regular heptadecagon | |

Type | Regular polygon |

Edges and vertices | 17 |

Schläfli symbol | {17} |

### What are regular polygons?

A polygon is a plane shape (two-dimensional) with straight sides. Examples include triangles, quadrilaterals, pentagons, hexagons and so on. all angles equal. Otherwise it is irregular. Here we look at Regular Polygons only. So what can we know about regular polygons? First of all, we can work out angles. and a line extended from the next side.

**How many sides does a polygon have?**

The polygon is a two-dimensional closed shape with all its sides connected to each other. The point at which two sides meet is called the vertex. The sides of the polygon are also called edges.

#### Which of the following is an example of irregular polygon?

Squares, rhombuses, equilateral triangles, and other regular polygons are examples. An irregular polygon is the one in which all of the sides and interior angles have distinct measurements.

**What are the different types of quadrilateral polygon?**

The different types of the quadrilateral polygon are square, rectangle, rhombus and parallelogram. The five-sided polygon is called pentagon polygon. When all the five sides of the polygon are equal in length, then it is called regular pentagon otherwise irregular pentagon. Another type of polygon is the hexagon which has 6 sides and 6 vertices.