Table of Contents

## What is the interior angle measure of decagon?

144°

Decagon/Internal angle

**What is the sum of 10 of the interior angles of a regular dodecagon?**

Since the sum of the degrees in a triangle is 180°, the sum of the interior angles of a dodecagon is 10 × 180° = 1800°.

### What is the sum of the internal angle measures in a dodecagon?

1800°

Triangles in a Dodecagon

Properties | Values |
---|---|

Exterior angle | 30° |

Number of diagonals | 54 |

Number of triangles | 10 |

Sum of the interior angles | 1800° |

**What is the sum of the interior angle measures?**

180°

Sum of Interior Angles Their interior angles add to 180° . Likewise, a square (a regular quadrilateral) adds to 360° because a square can be divided into two triangles.

## How do you find the sum 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 the measures of the angles of a convex and decagon?**

All sides are the same length (congruent) and all interior angles are the same size (congruent). To find the measure of the angles, we know that the sum of all the angles is 1440 degrees (from above)…

### What is the sum of the angle measure in a Undecagon 18 sides?

The sum of the measures of the interior angle of any polygon is the number of sides minus 2 multiplied by 180. A polygon with 18 sides has an interior angle sum of 2880 degrees.

**What is the sum of the measures of interior angles of a 14 Gon?**

By the Polygon Interior Angles Sum Theorem, the sum of the interior angle measures can also be expressed as . The measure of each interior angle of a regular polygon with 14 sides is about 154.3.

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

1260°

Nonagon/Sum of interior angles

**How do you find the sum of a dodecagon?**

[insert carefully drawn regular dodecagon] You can use this generic formula to find the sum of the interior angles for an n-sided polygon (regular or irregular): Sum of interior angles = (n-2) x 180° Sum of interior angles = 10 x 180° = 1800°