An arrowhead
The arrowhead has zero right angles.
Reflex angle
Yes
Yes.
yes it has one right angle
It can have at most one obtuse angle.
A right angled quadrangle! It can be a trapezium, kite, arrowhead, rectangle or square. It cannot be a parallelogram or rhombus - other than a rectangle or square respectively.
It could be a kite, an arrowhead or an irregular quadrilateral with a right angle - which has no specific name.
It can be a trapezium, kite, arrowhead, or a general quadrangle. Squares and rectangles also have one right angle - they have more that 1, but that still means they have 1.
Yes.
It can do but that is not a requirement.