Question

write the formula for finding the number of diagonals of any polygon?​

Answer 1

Step-by-step explanation:

Number of Diagonals = n(n-3)/2

This formula is simply formed by the combination of diagonals that each vertex sends to another vertex and then subtracting the total sides. In other words, an n-sided polygon has n-vertices which can be joined with each other in nC2 ways.