A square, a rectangle and an isosceles trapezoid
An impossibility. By definition a quadrilateral with 4 congruent sides must have congruent adjacent angles.
rhombus
No. If the diagonals of a parallelogram are congruent then it must be a rectangle (or square).
The quadrilateral that must have diagonals that are congruent and perpendicular is the square. This is because its diagonals form a right angle at its center.
For the quadrilateral to be a parallelogram, both pairs of opposite angles must be congruent.
One side cannot be congruent: it must be congruent to something!
Yes unless it is parallelogram
One kind does.Theres the equelateral triangle.It is all the way congruent.
a rhombus?
rhombus/square.
False. Could be a trapezoid.
square of course