In a parallelogram:
the opposite sides are parallel and congruent,
the opposite angles are congruent,
the consecutive angles are supplementary,
the diagonals bisect each other, and
a diagonal divides it into two congruent triangles.
to be simple both sides are congruent and both sides are parallel
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All rectangles have
A parrellelogram is a square with 2 parallel sides. The facing sides are of the same length.