Question 59

The number of diagonals in a decagon is:

Solution

Share

A decagon is a 10-sided polygon. The formula for number of diagonals is $$\frac{n(n-3)}{2}$$ 

Substituting n as 10 we get, $$\frac{10(7)}{2} = 35$$ 

So there are 35 diagonals in a decagon.

Hence, option D is the correct answer.

Get AI Help

Create a FREE account and get:

  • Download RRB Study Material PDF
  • 45+ RRB previous papers with solutions PDF
  • 300+ Online RRB Tests for Free

Join CAT 2026 course by 5-Time CAT 100%iler

Start your IIM journey with the right preparation and crack CAT 2026.

Enroll Now
Ask AI