Correct answer. Clear reason?

A correct option may have been guessed. Try an original geometry question, commit to an answer, then check the explanation with a visible counterexample. Use this nonclinical example to separate choosing an option from explaining why it is correct. Includes original moving illustrations, synthetic English narration, synchronized captions and one practice question. Study next: https://meyshan.com/app/recall Definitions checked against NRICH, University of Cambridge; no artwork copied or endorsement implied.