A polygon has 35 diagonals . Find the number of its sides .
( ans. 10 )
Dear Student!
Let the polygon has n sides.
So, the polygon is formed by n non-collinear vertices.
A line segment is formed by joining two points.

Since number of sides of a polygon is a natural number and is greater than 3, the number of sides of the given polygon, n is 10.
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