A rhombus, I believe.
it is a trapezium
square
It's a quadrilateral. There's no other name for it.
It is a square
a rectangleImproved Answer:-It is a parallelogram
the fewest sides of the same length a quadrilateral can have is 2. it can be in whatever shape as long as the each pair or lines has the same equal length. * * * * * Wrong! The correct answer is 0. All four sides of a quadrilateral can have different lengths. Such a quadrilateral has no specific name to distinguish it from other plane figures with four straight sides.
it is a trapezium
trapezium
Most quadrilaterals do not have opposite sides which are equal in length. Sadly, there is no special name for them.
square
a trapezoid
It's a quadrilateral. There's no other name for it.
It is a square
A quadrilateral is a shape with four straight sides. There are no curved sides in a quadrilateral.
The name for a quadrilateral with 4 sides of all different lengths is simply "quadrilateral". All of the specializations of quadrilaterals: parallelogram, trapezoid, kite, rhombus, rectangle, and square, have at least one pair sides with the same length.
a rectangleImproved Answer:-It is a parallelogram
There is, unfortunately, no special name.