square
Square.
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.
A square and a rectangle have diagonals of the same lengths.
Regular polygons. A square and rectangle will have congruent (equal length) diagonals.
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.
It is a square
the diagonals of a trepazoid always congruent?
square, rectangle and an isosceles trapezoid.
No. The diagonals are perpendicular, but they dont have to be congruent.
square
Only the square has.
square
Yes.
Yes.