trapezoid
Rhombus.
A square
Angles and sides are congruent when they are identical. A shape with four identical sides and angles is a square.
Rhombus. Because a rhombus has congruent (egual in shape and size) sides, but has no right angles.
A shape with 4 right angles and 4 equal sides is a square. ==========================
polygon
rhombus
A square
It is a square
A Rectangle
A right trapezoid can have no congruent sides and two right angles.
An equilateral parallelogram is a rhombus.If its angles happened to be right angles, then it would be a square.