ANSWER:
To prove that opposite sides of a parallelogram are congruent, we have to prove that the quadrilateral is a parallelogram.
The ways to prove that a quadrilateral is a parallelogram include:
- a quadrilateral with parallel opposite sides
- a quadrilateral with congruent opposite angles
- a quadrilateral with diagonals that bisect each other
Answer:
alternate interior angles of congruent
opposite sides are parallel
Step-by-step explanation:
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