Q. The number of diagonals in an octagon is:

  • (A) 16
  • (B) 20
  • (C) 24
  • (D) 28
✅ Correct Answer: (B) 20
Explanation: Number of diagonals = n(n − 3)/2 = 8 × 5 / 2 = 20.

Published by Mahesh Chandra ⭐ 7.32K Points at 16-Jul-2026 05:31 am in Math

Explanation by: Mahesh Chandra
Number of diagonals = n(n − 3)/2 = 8 × 5 / 2 = 20.

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