Question

The number of diagonals of a polygon with n sides is given by S (n)=n(n-3)/2

Part A
Which equation shown indicates that a 4-sided polygon has 2 diagonals?
S (2) = 4
S (4) = 2
S (2n) = 4
S (4n) = 2
Part B
What is the value of S (100), and what does it represent?
S(100) = ?
and it means that a polygon with ?sides has diagonals?

Answer 1

Divide 2n by1000 that’s how you get the answe