The interior angles of an 18 sided polygon add up to 2880 degrees
Interior angles total 40 - 4 right angles, ie 36 x 90o, so each interior angle is 18 x 9 ie 162o and the exterior is 180 - 162 = 18o
The interior angles add up to (20-2)*180 = 18*180 = 3240 degrees.The interior angles add up to (20-2)*180 = 18*180 = 3240 degrees.The interior angles add up to (20-2)*180 = 18*180 = 3240 degrees.The interior angles add up to (20-2)*180 = 18*180 = 3240 degrees.
Exterior angle = 360/20=18 interior angle = 180 - 18 = 162 Must be regular shape
(18-2)*180 = 2880 degrees
The interior angles of an 18 sided polygon add up to 2880 degrees
A 39 sided polygon
Interior angles total 40 - 4 right angles, ie 36 x 90o, so each interior angle is 18 x 9 ie 162o and the exterior is 180 - 162 = 18o
The interior angles add up to (20-2)*180 = 18*180 = 3240 degrees.The interior angles add up to (20-2)*180 = 18*180 = 3240 degrees.The interior angles add up to (20-2)*180 = 18*180 = 3240 degrees.The interior angles add up to (20-2)*180 = 18*180 = 3240 degrees.
Exterior angle = 360/20=18 interior angle = 180 - 18 = 162 Must be regular shape
(18-2)*180 = 2880 degrees
(18-2)*180 = 2880 degrees
A polygon refers to a plane figure that has at least three straight sides and angles. An 18 sided shape is called an octadecagon or octakaidecagon.
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.
For any N-sided polygon: Sum of the interior angles can be found by (N-2)*180°. Note that a 3 sided polygon (triangle) is the least number of sides possible. So for 18 sides: (18-2)*180° = 2880°
The sum of the interior angles in a n-sided polygon is (n-2) x 180o. For a 20 sided polygon: sum_interior_angles = (20 - 2) x 180o = 18 x 180o = 3240o.
It has 18 interior angles.