Q:
# How Many Diagonals Does a Decagon Have?

**A decagon has 35 diagonals regardless of whether it is a regular or irregular polygon.** This can be determined by using a simple formula that applies to polygons with any number of sides.

Credit:
hragvartanian
CC-BY 2.0

A diagonal, when used in reference to polygons, is a term used to describe the number of line segments that can be connected from any one vertex to another that is already attached to it. Since each vertex is already connected to itself and the two directly beside it, diagonals can be drawn to the number of vertices in the polygon minus three. This number is then multiplied by the number of vertices and divided by two to account for each line segment having two end points. Thus the formula n(n-3)/2, where "n" is the number of vertices, calculates the number of diagonals in any given polygon.

Learn more about Shapes-
Q:
## What Is a 10-Sided Polygon?

A: A 10-sided polygon is referred to as a decagon. "Deca" is used as a prefix that means 10, and it is used to create compound words. Full Answer >Filed Under: -
Q:
## How Many Diagonals Does a Nonagon Have?

A: A nonagon, or enneagon, is a polygon with nine sides and nine vertices, and it has 27 distinct diagonals. The formula for determining the number of diagona... Full Answer >Filed Under: -
Q:
## How Many Diagonals Does a Hexagon Have?

A: A hexagon has nine diagonals regardless of whether it is a regular or irregular polygon. This can be determined by utilizing a simple formula that applies ... Full Answer >Filed Under: -
Q:
## What Is a Ten Sided Shape Called?

A: A 10-sided shape is known as a decagon. It is a two-dimensional polygon, which means it is a closed shape consisting of 10 straight lines. Sides may or may... Full Answer >Filed Under: