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
a: 360
Four.
Four.
None.
2
It has one face.
In general, none.
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.