congruent right triangels
No. The diagonals of a parallelogram are congruent if and only if the parallelogram is a rectangle.
A regular polygon.
If you mean an isosceles triangle then no because all triangles have no diagonals
It is a square
the diagonals of a trepazoid always congruent?
No. The diagonals are perpendicular, but they dont have to be congruent.
congruent right triangels
Yes the diagonals of a square are always congruent. Their length is a*root 2 where a is the side of the square.
No. The diagonals of a parallelogram are congruent if and only if the parallelogram is a rectangle.
In a quadrilateral, the diagonals are only congruent for rectangles (or squares, which is a special kind of rectangle). Note: they are not congruent for a Rhombus.
Regular polygons. A square and rectangle will have congruent (equal length) diagonals.
A square and a rectangle have diagonals of the same lengths.
rectangle and parallelogram
A regular polygon.
The diagonals of a square. Each equals to s√2, where s is the side-length of the square. A rectangle and an isosceles trapezoid also have congruent diagonals.
If you mean an isosceles triangle then no because all triangles have no diagonals