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Mathematics 12 Online
OpenStudy (anonymous):

The proof by indirect method is shown below. In which step does the contradiction appear?Given: m∠AEC ≠ m∠DEB Prove: m∠AEB ≠ m∠DEC

OpenStudy (anonymous):

\[Step 1: Assume m∠AEB = m∠DEC Step 2: m∠CEB = m∠CEB\]

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