Using a protractor an 8 sided octagon angles will add up to 1080 degrees
Or use the formula: (n-2)*180 = sum of interior angles whereas 'n' is the number of sides of the polygon
Chat with our AI personalities
144 degrees
Exterior angle: 360/12 = 30 degrees Interior angle: 180-30 = 150 degrees
The 14 interior angles add up to 2160 degrees
Method 1: Interior angles of a regular n-sided polygon total (2n - 4) right angles or 180n - 360 degrees. Each angle is therefore ((180 x 25) - 360)/25 ie 165.6 degrees. Method 2: EXterior angles of regular n-sided polygon = 360/n degrees, in this case 360/25 ie 14.4 degrees. Interior angle = 180 - exterior ie 180 - 14.4 = 165.6 degrees.
You cannot. An interior angle of a 16-sided polygon can have any value. However, IF the polygon is regular, then each of its exterior angles is 360/16 = 22.5 degrees. The interior angle, being a supplementary angle to the exterior angle, will be 180-22.5 = 157.5 degrees.