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It is a parallelogram and if all 4 sides are equal then it is a rhombus
The interior angles of any regular pentagon, no matter the size, are all obtuse.
No there are different angle such as right angles, obtuse angles, and acute angles.
First of all it is 'obtuse' because one of the angles is greater than 90 degrees. Secondly it is a ' scalene' because all the angles are of different size, this will make all the sides of different size. So the the triangle is an 'Obtuse Scalene Triangle'.
A parallelogram. A rhombus (a special case of parallelogram, with all 4 sides equal length) also fits this criteria.