Problem 225 of 7
Correct the coordinate proof error: A student proves a quadrilateral has exactly one pair of parallel sides and concludes it is an isosceles trapezoid.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
catch formula, slope, midpoint, and conclusion mistakes.
Hidden until you reveal it.
Correction must address formula, slope, midpoint, or conclusion mistake.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Locate the incorrect coordinate calculation or conclusion.
2. State the correct formula or sufficient condition.
3. Explain how the proof should be repaired.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Only recalculating without explaining why the proof fails.