When it has 4 sides of the same lengths
In the U.S., that is a specific kind of "trapezium", which is a quadrilateral with no parallel sides.AnswerA quadrilateral with no parallel sides and no equal sides is basically just that, a quadrilateral.
Diagonally opposite pairs of angles will always be equal, but the only time all angles in a quadrilateral parallelogram are equal is when that shape is a rectangle.
rectangle, parallelogram
A parallelogram.
They are equal and parallel.
Equal and parallel
Rectangle Parallelogram
A quadrilateral. It may be a rectangle, parallelogram, trapezoid, or an irregular quadrilateral.
No. A square fits the classification of a quadrilateral and a parallelogram, but that isn't necessarily the definition. A rhombus is a quadrilateral and a parallelogram, and so are other irregular quadrilaterals. The correct definition would be a parallelogram and a quadrilateral with four right angles and all equal sides.
A parallelogram with four equal sides is a rhombus.You are a rhombus quadrilateral.
Parallelogram
A quadrilateral or an equal sided parallelogram