The simple answer is no, not all parallelograms have at least one right angle.
However, there are some that do. Rectangles and squares are 'special' parallelograms that all have at least one right angle.
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Most do, but a square or rectangle is a special case and has all right angles.
No. There are quadrilaterals that have no right angles.no,what about a trapizoid or rhombus
If one angle is right, then all angles are right. The diagonals of a parallelogram bisect each other. Opposite angles are congruent. Opposite sides are congruent. Consecutive angles are supplementary.
any parallelogram that does not have right angles.
No trapezoids are parallelograms, and no parallelograms are trapezoids.