Q: How many vertices does a octadecagon have?

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An octadecagon is an 18 sided polygon.

The name of a 18 sided polygon is Octadecagon.

16 vertices.16 vertices.16 vertices.16 vertices.

A pentacontagon has 50 vertices (not vertices's!).

octadecagon or octakaidecagon

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An octadecagon is an 18 sided polygon.

An octadecagon, also called an octakaidecagon, has 18 sides, from the Greek octa-, signifying 8, the connector -kai-, and deca- signifying 10.

The name of a 18 sided figure is an octadecagon or octakaidecagon. As you can see the prefix octa- means 8, and deca- means 10. It has 18 sides and 18 vertices,

The formula for the number of diagonals (that is, lines joining non-adjacent vertices) belonging to any shape is n(n-3)/2. Therefore, an eighteen-sided polygon has 18 x (18 - 3)/2 = 135 diagonals.

The name of a 18 sided polygon is Octadecagon.

octadecagon

16 vertices.16 vertices.16 vertices.16 vertices.

A pentacontagon has 50 vertices (not vertices's!).

An octadecagon

octadecagon

360

Octadecagon