Question

find the number of sides of a polygon which has 20 diagonals

Answer 1

here is ur answer mate...


The number of diagonals of a 20 sided figure = 20*(20 – 3)/2 = 170.
But one vertex does not send any diagonals. Each vertex makes a diagonal with (n-3) other vertices – it makes no diagonal with 3 vertex...

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Answer 2

HEY FRIEND...

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THE ANSWER IS....




The number of diagonals of a 20 sided figure = 20*(20 – 3)/2 = 170.
But one vertex does not send any diagonals. Each vertex makes a diagonal with (n-3) other vertices – it makes no diagonal with 3 vertices: itself, the vertex immediately to its left, and the vertex immediately to its right....




HOPE THIS WILL HELP U....



MRK AS BRAINLIEST....



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