Ответ:

  1. ∠APC и ∠HPO; ∠FOP и ∠COB.
  2. ∠AOB и ∠COD; ∠BOC и ∠DOA.
  3. ∠MKF и ∠EKH; ∠FKE и ∠HKM.
  4. ∠AOB и ∠COD; ∠AOD и ∠BOC.
  5. ∠LAP и ∠KAM.
  6. ∠DEP и ∠TER; ∠PET и ∠DER.