Question : How many diagonals are there in an octagon?
Option 1: 12
Option 2: 14
Option 3: 20
Option 4: 24
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Answer (1)
25th Jan, 2024
Correct Answer: 20
Solution :
Given: Number of sides of an octagon, $n=8$.
The number of the diagonals in a $n$ sided polygon is given as $\frac{n(n–3)}{2}$.
Number of diagonals of an octagon
= $\frac{8(8–3)}{2}$
= 20
Hence, the correct answer is 20.
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