It has 20 vertices, the same as the number of sides.
Chat with our AI personalities
A polygon has as many vertices as it has sides and so in this case it will have 20 vertices.
Duodecagon <--wrong... a duodecagon is a 12-sided polygon. icosagon is a 20 sided polygon.
A 20-sided polygon is an icosagon.(see related link)
18. If a polygon has n sides, then it has n-2 triangles.There are 18 triangles in a 20 sided polygon.
A 20-sided polygon is called an icosagon.