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.
Yes, a rhombus can have both acute and obtuse angles. A rhombus is a quadrilateral with all sides of equal length, but its angles can vary. Since the opposite angles of a rhombus are congruent, if one angle is acute (less than 90 degrees), then the opposite angle will also be acute. Similarly, if one angle is obtuse (greater than 90 degrees), then the opposite angle will also be obtuse.
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
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.
With 2 acute and 2 obtuse angles it has 4 angles - the shape is a quadrilateral. The shape can be one of trapezium, parallelogram, rhombus, kite or a general quadrilateral. With the two acute angles next to each other (forcing the two obtuse angles to be next to each other) the shape can be either a trapezium or a general quadrilateral.
Parallelograms normally have 2 congruent obtuse angles and 2 congruent acute angles that altogether add up to 360 degrees