rectangle and parallelogram
A square and a rectangle have diagonals of the same lengths.
square, rectangle and an isosceles trapezoid.
Rectangles
rectangle and parallelogram
A square
A square and a rectangle have diagonals of the same lengths.
Figures that do not always have congruent diagonals include trapezoids and general quadrilaterals. In a trapezoid, for instance, the diagonals can be of different lengths depending on the angles and side lengths. Similarly, most irregular quadrilaterals lack any specific properties that guarantee congruent diagonals. Only specific types of quadrilaterals, such as rectangles and squares, have congruent diagonals by definition.
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
Parallelograms or isosceles trapezium.
A square