rectangle and parallelogram
square, rectangle and an isosceles trapezoid.
Rectangles
rectangle and parallelogram
A square
rectangle and parallelogram
square, rectangle and an isosceles trapezoid.
square
Rectangles
Not generally.
Most quadrilaterals do not.
Most quadrilaterals will not have congruent diagonals: rectangles (incl squares) and isosceles trapezium are the exception.
rectangle and parallelogram
there is nothing listed
A square
Parallelograms or isosceles trapezium.
the diagonals of a trepazoid always congruent?