aparallelogram has 4 sides, with the twooppositesides being parallel
No, only sometimes. If a parallelogram has four equal sides, then it's also a rhombus, and could also be a square. Otherwise, it's just a parallelogram, and has only two pairs of equal sides.
Yes
aparallelogram has 4 sides, with the twooppositesides being parallel
The correct spelling is "parallelogram" (quadrilateral with two pair of parallel sides).
At least one pair, or one pair? If it is one pair, then it depends if the shape is regular or irregular.
No, only sometimes. If a parallelogram has four equal sides, then it's also a rhombus, and could also be a square. Otherwise, it's just a parallelogram, and has only two pairs of equal sides.