Problem 168 of 7
Choose the sufficient condition to prove a quadrilateral is a parallelogram from a pair of opposite sides is both parallel and congruent.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
select theorem based on available information.
Hidden until you reveal it.
Evidence must match a valid sufficient condition for parallelogram.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Identify what information is given about sides, angles, or diagonals.
2. Compare it with known parallelogram converse theorems.
3. Select the sufficient condition.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Insufficient conditions such as one pair of congruent sides only.