triunghiul echilateral
A parallelogram is such a shape.
rectangle
A kite (if it's a quadrilateral).
A kite
A rectangle.
A parallelogram is such a shape.
rectangle
The shape you are describing is a rhombus. A rhombus has two pairs of parallel sides, with opposite sides being equal in length. The diagonals of a rhombus are also equal in length, but they do not intersect at 90 degrees; instead, they intersect at a 90-degree angle.
A kite (if it's a quadrilateral).
A kite
A rectangle.
Square
A shape that has no pairs of opposite sides parallel is a trapezium (or trapezoid, depending on the region). In a trapezium, only one pair of sides may be parallel, while the other two sides are not. Other irregular polygons, such as pentagons or hexagons, can also have no pairs of opposite sides parallel, depending on their specific configurations.
If it has 2 pairs of parallel lines it is a parallelogram, if it is a quadrilateral. If there is not restrictions on the number of sides, then there are many answers
The shape is a parallelogram (special cases: rhombus, rectangle, square).
a dimond or rhombus
A Rhombus