Question

選擇題．

如圖，AO⊥BO，射線OC平分∠AOB，射線OD平分∠BOC，射線OE平分∠AOD，則∠COE等于

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A．11°．

B．11.25°．

C．11.45°．

D．12.25°．

Answer 1

答案：B