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Can you help me to find this answer, please, I need help

Can you help me to find this answer, please, I need help-example-1

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\it m(\widehat{DCA}) = m(\widehat{CBA}) +m(\widehat{BAC}) \Rightarrow m(\widehat{DCA}) \ \textgreater \ m(\widehat{CBA}) \Rightarrow \\ \\ \Rightarrow m(\widehat{DCA}) \ \textgreater \ 40^o

So, we choose: B) 70°

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