Question

How many diagonals does a regular pentagon has?

• A. $3$
• B. $4$
• C. $5$
• D. $6$

Answer 1

The correct option is C $5$

A regular pentagon has 5 diagonals on the inside of the shape.

The diagonals of any poygon can be calculated using the formula $n\times \frac{(n-3)}{2}$ where n is the number of sides, in case of a pentagon which "n" will be 5, the formula as expected is equal to 5.