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GeoGebra

第6题

Höfundur:郭子健
Umfjöllunarefni:Rúmfræði
6．（4分）如图，正五边形ABCDE内接于⊙O，连接OC，OD，则∠BAE﹣∠COD＝（　　） A．60°                            B．54°                              C．48°                            D．36°

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