Parrallelogram
a Rhombus...
trapizoid
The shape you are looking for is a quadrilateral. If you have a square, all angles MUST be right angles. A parallelogram can also have 4 equal sides in length and parallel sides, but a parallelogram doesn't have right angles.
octagon
This is a parallelogram called a rectangle. A square has four right angles and four sides that are equal in length.
A shape with opposite sides parallel and of the same length and four right angles is a rectangle.
A rectangle has 4 sides not the same length and 4 right angles.
Its a diamond :]
A rhombus
a rhombus
A rhombus.
parrallelogram
rectangle
A Rhombus
rhombus
Rhombus
Not possible ! If the shape has four right-angles, at least two sides must be the same length.