如图，为⊙O的直径，为弦，⊥，如果°，那么∠A等于A．°B．°C．°D

如图，

为⊙O的直径，

为弦，

⊥

，如果

°，
那么∠A等于

A．

B．

C．

D．

答案

B解析:
p;【解析】略

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如图，为⊙O的直径，为弦，⊥，如果°，那么∠A等于A．°B．°C．°D

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