How many diagonals does a regular nonagon have?
Show answer & explanation
Correct answer: B
Explanation
Number of diagonals in a polygon with n sides = n(n - 3)/2
Number of sides in a nonagon (n) = 9
Number of diagonals = 9(9 - 3)/2
= 9 × 6 / 2
= 27
SSC Selection Post 2025 PYQ — Question 35
SSC Selection Post - Matriculation Level - 29th August 2025 - Shift 3 • Quantitative Aptitude • Q35