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.
An obtuse angle can contain zero right angles. By definition, an obtuse angle measures more than 90 degrees but less than 180 degrees, while a right angle measures exactly 90 degrees. Therefore, it is impossible for any right angles to fit within the measurement of an obtuse angle.