{"schema_version":"ocme-site-results-v1","locale":"en","page_type":"derivations","facts":{"questions":36000,"reviewed":36000,"display_candidates":0,"knowledge":302,"guides":299,"paths":59,"batches":360,"families":1441,"atlas":302,"core":80,"evidence":9,"formal_evidence":5,"formal_subjects":4,"lean_files":6,"lean_toolchain":"leanprover/lean4:v4.30.0","question_state":"candidate","english_state":"ai_candidate","question_Lean":"NOT_RUN","canonical_truth_promotion":false},"filters":{"q":"mko-angle"},"kind":"guides","total":1,"pages":1,"page":1,"entries":[{"id":"derivation-mko-angle-01","title":{"zh-Hant":"角：對頂角相等的逐步證明","en":"Angle: a step-by-step proof that vertical angles are equal"},"summary":{"zh-Hant":"直線 AB 與直線 CD 是兩條相異直線，相交於 O，且 O 在 A、B 之間，也在 C、D 之間。證明對頂角相等：m∠AOC=m∠BOD 且 m∠COB=m∠DOA；再以 m∠AOC=35° 為例算出四個角。","en":"Distinct lines AB and CD meet at O, with O between A and B and between C and D. Prove that vertical angles are equal: m∠AOC=m∠BOD and m∠COB=m∠DOA; then, for m∠AOC=35°, compute all four angles."},"mko_ids":["mko-angle"]}],"title":"Concept derivation guides"}