How many diagonals are there in a pentagon? A. 5 B. 7 C. 6 D. 10 – InterviewSolution

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1.

How many diagonals are there in a pentagon? A. 5 B. 7 C. 6 D. 10

Answer»

Number of diagonals in Pentagon is

\(=n\times\frac{n\,-\,3}{2}\) [n represents number of sides]

\(=5\times\frac{5\,-\,3}{2}\)

\(=5\times\frac{2}{2}\)

= 5

So, Number of diagonals in pentagon is 5.

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