Only the diagonals of isosceles trapezoids are congruent.
If they are equally long such as the diagonals of rectangles and isosceles trapezoids.
Isosceles trapezoids, squares, and rectangles.
No. Most Trapezoids are not isosceles. The non parallel sides must be congruent to be isosceles.
A trapezoid with congruent diagonals is an isosceles trapezoid.
Only when they are isosceles trapezoids.
The diagonals of an isosceles trapezoid are congruent in lengths
No. An isosceles trapezium (isosceles triangle with its apex removed) would have congruent diagonals but it is not a parallelogram.
If you mean an isosceles triangle then no because all triangles have no diagonals
what is the congruent diagonals each of which divides the figure into two congruent isosceles right triangles