An irregular heptagon.
A parallelogram does not have to be four right angles. A parallelogram is a four sided shape with two parallel lines.
A general quadrilateral. No special name.
A four sided figure with four equal sides and no right angles is a diamond, or a rhombus. If it had four right angles, it would be a square.
A square or a rectangle
You can make a four sided shape with 3 right angles, but it must have another right angle, too. So technically, yes.
rectangle, square
No because a rectangle also has 4 right angles.
No. A trapezoid is any four sided shape which has at least two parallel sides. If it is four sided, cannot have exactly four right angles.
An irregular heptagon.
No. For example a parallelogram does not have any right angles. The internal angles of all four sided shapes will always equal 360 degrees, but do not necessarily have to include right angles.
A parallelogram does not have to be four right angles. A parallelogram is a four sided shape with two parallel lines.
No because the interior angles of a four sided shape can't exceed 360 degrees.
A right trapezium or an irregular quadrilateral.
If you mean shape there is no such shape. if a 4 sided shape has 2 right angles it MUST be either a square or a rectangle, in which case there are actually 4 right angles and 2 pairs of parallel sides. =)
A parallelogram, rhombus, or diamond, because a square would have FOUR right angles.
A general quadrilateral. No special name.