Question

Find The Number Of Diagonals of Polygon of 20 Sides?​

Answer 1

Answer:

In a 20-sided polygon, the total diagonals are = 20 (20-3)/2 = 170. But, since one vertex does not send any diagonals, the diagonals by that vertex needs to be subtracted from the total number of diagonals. In a polygon, it is known that each vertex makes (n-3) diagonals. In this polygon, each vertex makes (20-3) = 17 diagonals.

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Answer 2

Step-by-step explanation:

In a 20-sided polygon, the total diagonals are = 20(20-3)/2 = 170..

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