In the diagram of AABC, DE | AB, CD = 15, AD = 9, and AB = 40. %3D %3D 15 B. Complete the following proof to find the length of DE. Statements Reasons 1. DE AB, CD = 15, AD = 9, and AB = 40 %3D %3D 1. 2. LCDE N CAB 2. 3. ZDCE E ZACB 3. 4. ACDE~ACAB 4. 15 15+9 5. %3D 5. DE 40 6. DE 6. Simplify

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