Question

how many diagonals are there in a Polygon having 12 sides​

Answer 1

Answer:

54 diagonals

Step-by-step explanation:

The equation for finding number of diagonals in a n-sided polygon is, n(n-3)/2

For 12 sided polygon, number of diagonals is= 12(12-3)/2 =54.

One more simple example, we can check with our most familiar polygon

In a square ( n=4), number of diagonals = 4(4-3)/2 = 2.

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