![m\angle ATB=\frac{1}{2}[arc\ AB+arc\ DC]](/tpl/images/0382/2666/de34b.png)
![63\°=\frac{1}{2}[115\°+arc\ DC]](/tpl/images/0382/2666/4baf7.png)
![126\°=[115\°+arc\ DC]](/tpl/images/0382/2666/182fc.png)
Given: m∠atb = 63°, arc ab = 115° find: arc dc
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Answers: 2
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