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I can’t find anything to help me with this one
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I can’t find anything to help me with this one

User Leon Williams
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\begin{gathered} \angle DEC+\angle EDC+\angle ECD=180^0(sum\text{ of interior angles in a triangle)} \\ 45^0+65^0+\angle ECD=180 \\ \angle ECD=180-45-65 \\ \angle ECD=70^0 \end{gathered}
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User Jason Meckley
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