Any pair of adjacent angles.
No
Opposite angles in a parallelogram are congruent.
No, a paralleogram that has even one right angle must have all right angles in order to keep the opposite sides parallel. So, a parallelogram will have either no right angles (in which case it will always have 2 acute angles and two obtuse angles) or it will have 4 right angles (in which case it will be called a square or a rectangle, and will obviously have no acute or obtuse angles).
No it cannot, because the interior angles of a parallelogram ... or of anyfour-sided figure for that matter ... must add up to 360 degrees.
"abcd is not a parallelogram or it does not have any right angles." ~(P and Q) = ~P or ~Q
360. Any quadrilateral's angles add up to 360.
Some paralleograms are rectangles. A right paralleogram is a rectangle. In the case of a rectangle, all angles formed by the sides are right angles and opposite sides are parallel. The sum of adjacent angles in a parallelogram is 180 degrees.
360 degrees.
it is a square
A paralleogram having 4 congruent sides means it would be a rhombus or a square if it had right angles.
I have never come across the phrase "parallel angles". Please elaborate.