如图,将一副三角板叠放在一起,使直角的顶点重合于O,则∠AOC+∠D

如图,将一副三角板叠放在一起,使直角的顶点重合于O,则∠AOC+∠DOB=

A90°        B 120°      C160°      D180°

 


答案

D

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