Question

How many diagonals can be drawn from a vertex of an n-gon?

Answer 1

Answer In a poligon of n sides can be drawn n-3 diagonals from each vertex.

Explanation The triangle is the first closed polygon, which has three sides and it is not possible to draw any diagonal from a vertex. In a polygon with four sides it is already possible to draw a diagonal from each vertex to the opposite one. Then diagonals = n-3.

$\textit{\textbf{Spymore}}$​