A rectangle, or in some cases, a square.
a plane figure having six sides is a hexagon
A plane figure having four sides and four angles
In two dimensions, lines can be parallel, angles cannot. So no plane shape has parallel angles.
Yes, it can... but does not have to. A parallelogram is a four-sided plane figure with opposite sides parallel. So as long as it has opposite sides that are parallel, it is a parallelogram.
A trapezoid is a 4 sided quadrilateral having a pair of parallel lines of different lengths
square or rhombus
A square is a plane geometric figure having 4 equal sides and 4 right angles.
Yes, a parallelogram is a type of plane figure that has four straight sides and four angles. In a parallelogram, opposite sides are equal in length and parallel, while opposite angles are equal as well. Examples include rectangles, rhombuses, and squares, all of which are specific types of parallelograms.
That's a rhombus. With an additional constraint on the angles, it's also a square.
a decagon
Triangle
trapezium