Any angle that is above 90 degrees is considered an obtuse angle.
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There are 3 obtuse angles. All 3 exterior angles are obtuse. (This is, admittedly, a bit of trick question!)
If it is a 'regular' hexagon, then all angles are congruent, and all are obtuse.
The sum of the interior angles on an Obtuse Triangle is 1800 . This is true of ALL triangles.
A Hexagon has 3 pairs of parallel line and all angles are obtuse.
The interior angles of any regular pentagon, no matter the size, are all obtuse.