**We can very easily calculate the sum of the internal angles of a polygon using the following formula:**

When: $n =$ number of edges or sides of the polygon

**In reality, the sum of all the internal angles of a polygon depends on the number of edges it has.**** Steps to follow to find the sum of the internal angles of a polygon:**

- Count how many sides it has.
- Place it in the formula and we will obtain the sum of the internal angles of the polygon.

Pay attention:

In the formula, there are parentheses that require us to first perform the operations of subtraction (first we will subtract $2$ from the number of edges and only then multiply by $180$.)

Regardless of the polygon you have, concave, convex, or regular, thanks to this formula you will be able to find the sum of the internal angles of any polygon.