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A quadrilateral is a parallelogram if a pair of adjacent sides is equal and parallel.
In a parallelogram, all sides are equal.
If the sides of a quadrilateral bisect each other, then it is a parallelogram.
If in a quadrilateral, each pair of opposite angles is equal, then it is a parallelogram.
The line drawn through the mid-point of one side of a triangle, parallel to another side bisects the third side.
In a parallelogram, opposite angles are equal.
Choose any three correct theorems.
1.
2.
3.
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