## How many lines of symmetry are in a decagon?

10Decagon / Line of symmetry

## How many lines of symmetry does a regular dodecagon?

A regular dodecagon is a figure with sides of the same length and internal angles of the same size. It has twelve lines of reflective symmetry and rotational symmetry of order 12.

**Which shape would you expect to have more lines of symmetry a regular octagon or an irregular decagon?**

A regular octagon has 8 lines of symmetry. A regular decagon has 10 lines of symmetry.

**How many diagonals does a regular decagon have?**

35

A regular decagon has all sides of equal length and each internal angle will always be equal to 1440 as shown in figure. (n-3) multiply by the number of vertices and divide by 2. So the number of diagonals in a decagon are 35. So this is the required answer.

### How many lines of symmetry does a regular Nonagon have?

9 lines of symmetry

A regular nonagon has 9 lines of symmetry and a rotational symmetry of order 9, meaning that it can be rotated in such a way that it will look the same as the original shape 9 times in 360°. Nine 40° of rotation about the center.

### What is a regular decagon?

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. An irregular decagon is the type of decagon with unequal sides and angles.

**How many triangles are in a regular decagon?**

eight triangles

There are eight triangles in a regular decagon. We know that the sum of the angles in each triangle is 180°. Thus, 180° × 8 = 1440°. Therefore, the sum of all the interior angles of a decagon is 1440°.

**How many sides has a decagon have?**

10Decagon / Number of edges

## How many lines of symmetry does a regular Pentagon have?

5 lines of symmetry

A regular pentagon has 5 sides and 5 lines of symmetry. The number of lines of symmetry in a regular polygon is equal to the number of sides.

## How many angles are there in a regular decagon?

ten interior angles

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.

**How many triangles are there in a decagon of 10 sides?**

There are eight triangles in a regular decagon.

**What does a regular decagon look like?**

A decagon is a polygon with ten sides. Polygons are closed two-dimensional shapes with straight lines. This means polygons include triangles, squares, and decagons, but not circles or ovals. The most basic decagon has ten equal sides and ten equal interior angles, or angles which face the inside of the polygon.

### How many lines of symmetry does a regular octagon have?

8 lines of symmetry

A regular octagon has 8 lines of symmetry.

### How many lnes of symmetry does a decagon have?

The regular decagon has Dih 10 symmetry, order 20. There are 3 subgroup dihedral symmetries: Dih 5 , Dih 2 , and Dih 1 , and 4 cyclic group symmetries: Z 10 , Z 5 , Z 2 , and Z 1 . These 8 symmetries can be seen in 10 distinct symmetries on the decagon, a larger number because the lines of reflections can either pass through vertices or edges.

**What polygon has the most lines of symmetry?**

Introduction to Symmetry. Symmetry is a fundamental geometrical concept that may be found in nature and applied in nearly every activity.

**Does a decagon have rotational symmetry?**

Does a decagon have translation symmetry? 2 Answers. A regular decagon has both rotational and reflection symmetry. So a regular decagon has rotational symmetry with a 36 degree angle of rotation. Keep in mind the decagon must be regular which mean the sides are all congruent and the angles are all equals.

## What are the 5 types of symmetry?

Animal Characterization Based on Body Symmetry. At a very basic level of classification,true animals can be largely divided into three groups based on the type of symmetry of their