A general quadrilateral or a kite.
it is an irregular shape
It is nearly the shape of a square but one side is sloping and I think it is called a trapezoid
a diamond does. There are two obtuse angles in it.
if you are talking about regular polygons, then nothing has an obtuse angle. otherwise, pretty much any shape can have an obtuse angle
An obtuse angle.
this shape would be a rhombus