Q: Where d is the number of diagonals of a polygon with n sides find d if n equals 20?

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The five sided Polygon has 5 diagonals

Number of sides minus 2 equals the number of triangles within the polygon.

The formula is: 0.5*(n2-3n) = diagonals whereas n is the number of sides of the polygon

A polygon with 14 diagonals will have 7 sides

209

Related questions

A 7 sided polygon has 14 diagonals

The five sided Polygon has 5 diagonals

Number of sides minus 2 equals the number of triangles within the polygon.

Number of diagonals = 1/2*(n2-3n) where n = the number of sides of the polygon.

Number of sides minus two equals number of diagonals drawn from one vertex.

38 diagonals

It has 20 diagonals

1/2*(n2-3n) = number of diagonals 1/2*(202-60) = 170 diagonals

It is: 0.5*(n2-3n) = diagonals whereas n is the number of sides of the polygon

The formula is: 0.5*(n2-3n) = diagonals whereas n is the number of sides of the polygon

A polygon with 14 diagonals will have 7 sides

11