A rhombus.
Its a diamond :]
A rhombus
The rectangle
a Rhombus...
A rhombus.
A shape that has four right angles is a rectangle. If all four sides are equal in length, then it is a square.
rectangle
square
octagon
This is a parallelogram called a rectangle. A square has four right angles and four sides that are equal in length.
A Rhombus
rhombus