Q:
# How Many Triangles Are in a Pentagon?

**Three triangles can be drawn inside a regular pentagon.** If the diagonals are drawn from any one vertex of the pentagon, the number of triangles formed is given by the formula n - 2, where “n” is the number of sides of the polygon.

Credit:
Phillipe Put
CC-BY 2.0

A pentagon has five sides, with three interior triangles; 5 - 2 = 3. However, if every vertex is connected to every other vertex and the triangles formed by the intersection of the diagonals are also counted, a total of 31 triangles can be formed. Dividing a pentagon into triangles can help in calculating the area of a pentagon, especially if it is an irregular pentagon. The sum of the interior angles of a pentagon is always 540 degrees.

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Q:
## What Is a 3D Pentagon Shape Called?

A: One term used for a 3D pentagon is a shape called a pentagonal prism. According to Reference.com, this is the polygon that results when you take a pentagon... Full Answer >Filed Under: -
Q:
## How Many Vertices Does a Pentagon Have?

A: A pentagon has five vertices. In geometry, a vertex is the point of meeting of two or more straight lines. The term "vertex" comes from Latin and has the p... Full Answer >Filed Under: -
Q:
## How Many Sides Does a Pentagon Have?

A: A pentagon is a two-dimensional geometric figure that has five sides. A regular pentagon is one where all five sides are the exact same length and the inte... Full Answer >Filed Under: -
Q:
## What Are Some Examples of a Pentagon?

A: There are examples of pentagons in real life in man-made structures like the Pentagon in the United States, and also in nature in flowers like morning glor... Full Answer >Filed Under: