isogon: 20 sides proof: 180(n-2)/n 180(18)/20 3,240/20 162 Thus, each angle is 162 degrees, which is greater that 90 making it obtuse.
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Any number of sides of 5 and above because all interior angles of regular polygons in this category will have obtuse interior angles.
Yes a regular pentagon has five interior angles of 108 degrees
A hexagon has six angles. A regular hexagon has six angles and each one is equal in measure to 120 degrees. 120 degrees is an obtuse angle. Any regular polygon with at least 6 sides has at least 6 obtuse angles.
An obtuse angle is an angle that is greater than 90 degrees but less than 180 degrees. The internal angles of any regular polygon with 5 or more sides will be obtuse.
Oh, what a happy little question! In a star shape, each point creates an angle. If we connect those points, we can see that each angle is less than 90 degrees, so there are no obtuse angles in a star. Just think of all those lovely acute angles coming together to make a beautiful star!