A regular 100 gon will fit inside a circle so the sum of exteriors =360
each exterior =360/100 =3.6
one interior = 180-3.6=176.4
100 interiors sum to 17640
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The interior angles of an 11-gon add up to 1620 degrees
The sum of the interior angles is 6480 degrees.
Sum of what aspect of a 20-gon: the length of its sides, its interior angles, its exterior angles, its apothems?
The interior angles of a 30-gon add up to 5040 degrees
Its interior angles add up to 1800 degrees