The interior angles of a 9 sided nonagon add up to 1260 degrees and its exterior angles add up to 360 degrees
The exterior angle of a 7 sided shape add up to 360 degrees The interior angles of a 7 sided shape add up to 900 degrees
An 8 sided polygon is an octagon and has exterior angles that add up to 360 degrees and its interior angles add up to 1080 degrees
The interior angles of an 11 sided polygon add up to 1620 degrees
The 7 interior angles add up to 900 degrees
The internal angles of an n-sided shape add to (n-2)*180 degrees. So, for an 8-sided shape, they would add to 6*180 = 1080 degrees.
The exterior angles of a 15 sided shape add up to 360 degrees
The interior angles of a 24 sided shape add up to 3960 degrees
The total sum of angles of an n-sided shape is (n-2)x180o Hence, the angles in a five sided shape add up to (5-2)x180o = 3 x 180o = 540o
The interior angles of a 9 sided nonagon add up to 1260 degrees and its exterior angles add up to 360 degrees
360
180
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The 8 interior angles of an 8 sided octagon add up to 1080 degrees
The interior angles of a 15 sided polygon sum to 2340 degrees