1.

How many diagonals are there in a polygon having 12 sides?(a) 12 (b) 24 (c) 36 (d) 54

Answer»

(d) 54

Explanation:

We know that to calculate number of diagonals in octagon is

n × (n -3)/2

But here n=12

12 × (12-3)/2 = 54



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