Answer:
[tex]\frac{n(n-3)}{2}[/tex]
Step-by-step explanation:
Polygon Diagonals are a pattern that follows a specific rule which can be used through a specific formula. Remember that Math focuses on patterns to create equations that help to study them, and this case is not an exception.
The equation for polygon diagonals is
[tex]\frac{n(n-3)}{2}[/tex]
Where [tex]n[/tex] refers to the number of sides of the polygon.
You see, a diagonal is defined as the union between two non-consecutive vertices. For a convex n-sided polygon, there are going to be n vertices, and we can draw [tex]n-3[/tex] from each vertex, then we multiply this by [tex]n[/tex], because that's the total number of sides.
In the end, we divide by 2, because with the method described, we will have double number of diagonals.