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Parallelogram Parallelogram is a four sided shape where opposite sides are parallel. Properties: 1. Opposite sides are congruent. 2. Opposite angles are congruent. 3. Consecutive angles are supplementary. 4. The diagonals of a parallelogram bisect each other. 5. Each diagonal of a parallelogram separates it into two congruent triangles. 6. If one angle is right, then all the angles […]