Any polygon with 5 sides or more or a trapezoid that doesn't have a right angle in it or a kite that is not a square.
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It depends on the obtuse angle. An obtuse angle in general has a measure greater than 90 but less than 180.
No, an obtuse triangle can not have more than one obtuse angle. This is because all of the angles have to add up to 180 and the smallest obtuse angle you can have is 91 degrees. So 180-91=89. 89 degrees is the angle that you need to complete the triangle and it is an acute angle. Therefore, you can not have more than one obtuse angle in an obtuse triangle.
An obtuse angle is an angle more than 90 degrees but an acute angle is an angle less than 90 degrees.
An obtuse angle is one that measures more than 90° and less than 180°.
An angle of more than 90 degrees is called an "obtuse" angle. Strictly speaking an obtuse angle is from 90 to 180 degrees.