The missing step is between steps 2 and 3 because the student did not state m∠BOC + m∠COD = m∠BOD . This statement is true because of the angle addition postulate . ;
The missing step lies between steps 2 and 3, where it should state that m∠BOC + m∠COD = m∠BOD, justified by the angle addition postulate. This ensures clarity in the logical progression of the proof. Including this step strengthens the argument that complements are related to their respective formed angles.
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