The 8 angles in an octagon add up to 1080 degrees
Exterior angles add up to 360 degrees Interior angles add up to 900 degrees
The measures of the interior angles of a 5 sided polygon (pentagon) will add up to 540°.
900° The formula for the sum of the angles of an n-sided figure is (n-2)x180°. For a 7 sided shape this would be (7-2)x180° = 5*180° = 900°
The interior angles of a 7 sided polygon add up to 900 degrees
The interior angles of a 9 sided nonagon add up to 1260 degrees and its exterior angles add up to 360 degrees
A dodecagon is a 12 sided polygon which can be regular or irregular and its interior angles add up to 1800 degrees
The 8 interior angles of an 8 sided octagon add up to 1080 degrees
The interior angles of a 19 sided polygon add up to 3060 degrees
The interior angles of an 8 sided octagon add up to 1080 degrees
The interior angles of a 20 sided polygon add up to 3240 degrees
The exterior angles of a 15 sided shape add up to 360 degrees
The interior angles of a 15 sided polygon sum to 2340 degrees