Best Answer

There several such properties, including:

* The lengths of the sides

* The ratio of length to width

* The angles

Q: Which property is not common to all parallelograms?

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Diagonals are congruent

No trapezoids are parallelograms, and no parallelograms are trapezoids.

By definition, all squares are parallelograms. Not all parallelograms, however, are squares. All rectangles and rhombuses are also parallelograms.

No trapezoids are parallelograms, and no parallelograms are trapezoids.

Opposite angles/sides are equal.

Related questions

Yes. All rectangles are also parallelograms, but not all parallelograms are rectangles.

Diagonals are congruent

They all have parallel lines.

They are quadrilaterals; opposite sides are parallel.

All squares are parallelograms, but all parallelograms are not squares.

No trapezoids are parallelograms, and no parallelograms are trapezoids.

No trapezoids are parallelograms, and no parallelograms are trapezoids.

No, but all parallelograms are trapezoids.

No but all parallelograms are trapezoids

No. All rhombi (rhombuses) are parallelograms but all parallelograms are not rhombi.

By definition, all squares are parallelograms. Not all parallelograms, however, are squares. All rectangles and rhombuses are also parallelograms.

No trapezoids are parallelograms, and no parallelograms are trapezoids.