Q: What polygon has 20 sides?

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A polygon with 20 sides is an icosagon.

It has 360/20 = 18 sides

A polygon with n sides had n*(n-3)/2 diagonals. So a 20 sided polygon would have 20*17/3 = 170

It has 20 vertices.

Icosagon.

Related questions

A polygon with 20 sides is an icosagon.

It has 360/20 = 18 sides

There is no such figure as a 20 degrees polygon.

There is a corresponding side to every angle. 20... A polygon has as many sides as it does angles.

icosagon

Icosagon

There is no such polygon but if you meant exterior angles of 20 degrees then it will have 360/20 = 18 sides

A polygon with n sides had n*(n-3)/2 diagonals. So a 20 sided polygon would have 20*17/3 = 170

It has 20 vertices.

Icosagon.

Icosagon

20, because a polygon has the same number of sides and vertices.