All regular polygons.
The diagonals are perpendicular, but not necessarily congruent.
Most quadrilaterals will not have congruent diagonals: rectangles (incl squares) and isosceles trapezium are the exception.
Rhombus.
Square.
Yes the diagonals of a square are always congruent. Their length is a*root 2 where a is the side of the square.
If the diagonals are cong. then the figure is a rectangle.
what is the congruent diagonals each of which divides the figure into two congruent isosceles right triangles
A regular polygon.
If the diagonals are congruent and are perpendicular bisectors of each other then the parallelogram is a square. If the diagonals are not congruent but are perpendicular bisectors of each other then the figure would be a rhombus.
A square or a rectangle.
No, kites do not have congruent diagonals.
are the diagonals in a trapezoid congruent
The diagonals are perpendicular, but not necessarily congruent.
I think this is impossible the diagonals of a four sided figure will cross
No. The diagonals are perpendicular, but they dont have to be congruent.
A trapezoid with congruent diagonals is an isosceles trapezoid.
Only the diagonals of isosceles trapezoids are congruent.