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Wolfsgang · Answer 1 · 2018-07-31T21:59:11+0000

You have 2 kind of SUM, either the interior angles or the exterior's.

For the interior angles, if n is the number of sides then
sum of all INTERIOR angles =(n-1).180°

Regarding the EXTERIOR angles, whatever is the number of sides, the sum of all EXTERIOR angles = always 360°

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