there are 4 angles and normally, there would be 2 angles that are smaller than a right angle
Except of cause if the parallelogram is a square or a rectangle, all angles are equal to 90 i.e. right angle
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A parallelogram, in general, has no right angles.
No, a parallelogram does not have any right angles by definition. A parallelogram is a quadrilateral with opposite sides that are parallel and equal in length. Right angles are angles that measure exactly 90 degrees, which are not present in a parallelogram unless it is a special case like a rectangle or a square.
A parallelogram cannot have just one right angle. If it has one, all four of its angles must be right angles and so it must be a rectangle (or, as a special case, a square).
Yes, that is what is rectangle is. One can prove that all of the angles are right angles.
An angle smaller than a right angle - is an acute angle. Larger than a right angle, but smaller than 180 degrees is an obtuse angle. Angles between 180 and 360 degrees are reflex angles.