It has 18 interior angles.
The sum of the interior angles of an n-gon is given by the formula (n-2)(180) where n is the number of sides of the polygon. Thus, the sum of the interior angles of an 18-gon is (18-2)(180) = 2880.
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".
its 2880 degrees total
180x28 is the sum of the interior angles in a 30- gon
It has 18 interior angles.
Interior angles of a regular 18 gon (octdecagon) are 160o.
The sum of the interior angles of an n-gon is given by the formula (n-2)(180) where n is the number of sides of the polygon. Thus, the sum of the interior angles of an 18-gon is (18-2)(180) = 2880.
(18-2)*180 = 2880 degrees
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".
(18-2)*180 = 2880 degrees
The sum of the interior angles of a polygon with n sides is (n-2)*180 degrees. So, the sum of the interior angles of an 18-gon is 16*180 = 2880 degrees. Subject to this sum, each particular angle can range from 0 to 360 (not inclusive) degrees. If you assume that all the angles of the 18-gon are equal, then you can say that each angle is 2880/18 = 160 degrees. However, there is absolutely no reason to support such an assumption.
its 2880 degrees total
(18-2)*180 = 16*180 = 2880 degrees.
((2 x 18) - 4) x 90 = 2880o
180x28 is the sum of the interior angles in a 30- gon
Providing that it is a regular 20-gon then each exterior angle is 360/20 = 18 degrees