[img]2012q1/ct_egreqm_egreqjs_0264_20121[/img] In the figure above, the radius o

游客2024-01-12 42

问题

In the figure above, the radius of circle O is 3, and m∠AOB=60. What is the perimeter of the shaded region?

选项 A、
B、
C、
D、
E、

答案 C

解析

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