No.
In fact a parallelogram does not add up. It has a perimeter, it has an area, it has four angles and they are or can be added up. The the parallelogram itself cannot.
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No because the 4 interior angles of a parallelogram add up to 360 degrees
They add up to 180 degrees.
A parallelogram has 4 sides and 4 angles that add up to 360 degrees whereas a triangle has 3 sides and 3 angles that add up to 180 degrees.
No. Opposite angles are equal. Adjacent angles are supplementary.
No parallelogram can have only one right angle. The consecutive angles of a parallelogram must be supplementary, meaning they must add up to 180. 180-90=90, so all the angles must be right angles.