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An 18-gon, also known as an octadecagon, has 18 sides. To find the number of triangles in an n-gon, you can use the formula (n-2)C3, where C represents a combination. Plugging in n=18, we get (18-2)C3 = 16C3 = 16! / (3!(16-3)!) = 16! / (3! * 13!) = 161514 / 321 = 560. Therefore, an 18-gon has 560 triangles.
What else can I help you with?
How many sides on an 18-gon?
There are 18 sides
How many interior angles does a 18-gon have?
(18-2)*180 = 2880 degrees
How many triangles can you form in a hexagon from one vertex?
18
What do you call a solid with 18 faces?
18-gon is its name.
How many sides does a regular 18 gon have?
A regular 18-gon, also known as an octadecagon, has 18 sides. Each side is of equal length, and each internal angle measures 150 degrees. This polygon is part of the family of polygons that can be defined with any number of sides.
How many triangles are im a 20 gon?
18 triangles can be found in a 20-agon
How many sides on an 18-gon?
There are 18 sides
How many Rotational symmetries does a regular 18-gon have?
18
How many interior angles does a 18 gon have?
It has 18 interior angles.
How many interior angles does a 18-gon have?
(18-2)*180 = 2880 degrees
How many triangles can be formed from a vertex of 20 sided polygon?
18 triangles
What is the name of polygons from 11-20?
11- undecagon 12- dodecagon 13- 13-gon 14- 14-gon 15- 15-gon 16- 16-gon 17- 17-gon 18- 18-gon 19- 19-gon 20- 20-gon
How many triangles are in a 20 sided polygon?
18. If a polygon has n sides, then it has n-2 triangles.There are 18 triangles in a 20 sided polygon.
What is the sum of 18-gon?
The question makes no sense since a 18-gon cannot be added. You can add the measures of its interior or exterior angles, or the lengths of its sides, its diagonals and so on. But there is no such thing as a "sum of 18-gon".
Mesuare of a 18-gon?
the measure of an 18-gon triangle is found by using the polygon angle sum theorem.Thanx for the question!!(;
What is the measure of each of the interior angles of a regular 18 gon?
Interior angles of a regular 18 gon (octdecagon) are 160o.
How many triangles can you form in a hexagon from one vertex?
18
