Question

A polygon 7 sides.How many diagonals can be formed?

A) 14 B) 7 C) 15 D) 21

Answer 1

Answer:

A) 14

Step-by-step explanation:

The number of diagonals can be found by: n(n-3)/2. So in this case :7(7 - 3)/2 = 74/2 = 14 diagonals.

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Answer 2

Answer:

A). 14

Step-by-step explanation:

$\frac{n(n-3)}{2}$ = numbers of diagonals in polygon

$\frac{7(7-3)}{2}$ = 14