It is a rhombus
It is a rhombus which also has 2 acute angles
A parallelogram is a quadrilateral with opposite sides parallel and congruent.
An obtuse triangle must have two acute angles and these can be congruent.
A rhombus has 2 opposite acute angles and 2 opposite obtuse angles
If it is a 'regular' hexagon, then all angles are congruent, and all are obtuse.
It is a rhombus which also has 2 acute angles
A parallelogram is a quadrilateral with opposite sides parallel and congruent.
An obtuse triangle must have two acute angles and these can be congruent.
Yes.
No. Except for the case of a square (a special case of rhombus), a rhombus will have 2 congruent acute angles, and 2 congruent obtuse angles. The square has 4 right angles. In fact, every quadrilateral will have either all 4 angles equal to right angle (square and rectangle), or will have at least 1 obtuse angle (also at least 1 acute).
Parellelogram
Impossible. You cannot have an obtuse angle without an acute angle in a quadrilateral.
In general a rhombus has one opposite pair of congruent acute angles and one opposite pair of congruent obtuse angles. A square, however, is a rhombus with four right angles.
A rhombus has 2 opposite acute angles and 2 opposite obtuse angles
yes
If it is a 'regular' hexagon, then all angles are congruent, and all are obtuse.
A trapezoid