It is just an irregular quadrilateral.
It is an irregular quadrilateral. It cannot have any parallel sides.
An arrow head
No quadrilateral with 2 internal right angles can be anything other than a square or rectangle. The shape described in the question does not exist.Improved Answer:-It could be a trapezoid with two right angles, an acute angle and an obtuse angle.
a trapezium ,perhaps
No shape has only 1 parallel side. A trapezoid is a 4-sided shape, or quadrilateral, with only 2 parallel sides; it does not necessarily have to have 2 right angles. (In the UK a trapezoid is called a trapezium.) In North America, a trapezium is a quadrilateral with 0 (no) parallel sides.
a right triangle
that's a rhombus with no right angle
A trapezoid can have 2 right angles, an obtuse and an acute angle Or a kite.