Q. The number of diagonals in a octagon will be
A) 28
B) 20
C) 10
D) 16
Explanation
(b)
In a octagon there are eight sides and eight points
$\therefore$ Required number of diagonals
$= {\ ^{8}C}_{2} - 8 = 28 - 8 = 20$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.