Not so sure about angels, but an irreugular trapezoid has 1 or 2 obtuse angles.
Exactly two.
It has 1 obtuse angle and 2 acute angles and the 3 interior angles add up to 180 degrees
there are 0 right angles in a trapazoid
Four.
a: 360
Four.
In general, none.
2
None.
It has one face.
None.
One pair.