To determine the total number of degrees of any polygon, you can use the equation y=180x-360, where x is the number of sides.
In your case, it would be y = 180(21) - 360, which equals 3420 degrees.
icosihenagon= 21-sided polygon icosihenagon= 21-sided polygon
The name of a 21 sided polygon is Icosihenagon.
An icosikaihena is a polygon with 21 sides
The name of a 21 sided polygon is Icosihenagon.
Icosikaihenagon
icosihenagon= 21-sided polygon icosihenagon= 21-sided polygon
The sum of the exterior angles of any polygon, regardless of the number of sides, is always 360 degrees. Therefore, the sum of the exterior angles of a 21-sided polygon is 360 degrees.
The name of a 21 sided polygon is Icosihenagon.
The names of polygons with sides ranging from 21 to 30 are as follows: a 21-sided polygon is called a icosagon, a 22-sided polygon is a dicosagon, a 23-sided polygon is a tricosagon, a 24-sided polygon is a tetracosagon, a 25-sided polygon is a pentacosagon, a 26-sided polygon is a hexacosagon, a 27-sided polygon is a heptacosagon, a 28-sided polygon is an octacosagon, a 29-sided polygon is a nonacosagon, and a 30-sided polygon is a triacontagon.
180*(21-2) = 180*19 = 3420 degrees.
An icosikaihena is a polygon with 21 sides
The name of a 21 sided polygon is Icosihenagon.
The number of triangles formed by the diagonals of a 21 sided polygon is C(21,3) = 21x20x19/3x2x1 = 1,330.
Icosagon
Icosikaihenagon
21
icosihenagon