#### What is the sum of the interior angles of a decagon

## How do you find the sum of the interior angles of a decagon?

The sum of the measures of the interior angles of a decagon (10 sided polygon) is 1,440. We found this by using the formula (n-2)(180). Thus, to find the measure of each interior angle we simply divide the sum by the number of total sides in the polygon. 1,440/10 = 144.

## What is the sum of interior angles in a 12 sided polygon?

Using the same methods as for hexagons to the right (I’ll let you do the pictures) So, the sum of the interior angles of a dodecagon is 1800 degrees .

## What is the sum of the interior angles of a 18 sided polygon?

Regular Polygons

Sides | Name | Interior Angles |
---|---|---|

18 | Octdecagon | 160.00° |

19 | Enneadecagon | 161.05° |

20 | Icosagon | 162.00° |

30 | Triacontagon | 168.00° |

## What is the sum of the interior angles of a 20 sided polygon?

When you divide a polygon into triangles, the number of triangles is always 2 less than the number of sides . This means that all of the interior angles of any 20 – sided polygon add up to 3240°.

## What is the sum of interior angles of a Heptagon?

900°

## What is the formula for interior angles?

An interior angle is located within the boundary of a polygon. The sum of all of the interior angles can be found using the formula S = (n – 2)*180. It is also possible to calculate the measure of each angle if the polygon is regular by dividing the sum by the number of sides.

## What is the sum of the interior angles of a 25 sided polygon?

The sum of any pentacontagon’s interior angles is 8640 degrees .

## What does sum of interior angles mean?

Sum of Interior Angles Formula This formula allows you to mathematically divide any polygon into its minimum number of triangles. Since every triangle has interior angles measuring 180° , multiplying the number of dividing triangles times 180° gives you the sum of the interior angles .

## How many sides does a polygon have if the sum of the interior angles is 1800?

The sum of the interior angles, in degrees, of a regular polygon is given by the formula 180 (n – 2), where n is the number of sides. The problem concerns a polygon with twelve sides , so we will let n = 12. The sum of the interior angles in this polygon would be 180 (12 – 2) = 180 (10) = 1800.

## What is the sum of the interior angles of a 29 sided polygon?

(n-2)x 180 degrees : The formula for finding the sum of all angles in a polygon (REGULAR). Here “n” represents the number of sides of the polygon .

## What is the sum of the interior angles of a 17 sided polygon?

The sum of the interior angles of a 17 – sided convex polygon is 2700°, and the sum of the exterior angles is 360°.

## How many sides does a polygon have if the sum of its interior angles is 1620?

Using the same methods as for hexagons to the right (I’ll let you do the pictures) So, the sum of the interior angles of an 11-gon is 1620 degrees.

## What is the sum of the interior angles of a 9 sided polygon?

The General Rule

Shape | Sides | Sum of Interior Angles |
---|---|---|

Octagon | 8 | 1080° |

Nonagon | 9 | 1260° |

.. | ||

Any Polygon | n | (n−2) × 180° |

## What is the sum of the interior angles in a shape with 27 sides?

The sum of any icositetragon’s interior angles is 3960 degrees.

## What is the sum of the interior angles of a 21 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 . Icosagon.

Regular icosagon | |
---|---|

Coxeter diagram | |

Symmetry group | Dihedral (D_{20}), order 2×20 |

Internal angle ( degrees ) | 162° |

Dual polygon | Self |