Na circunferencia a seguir, AÔB=130° AC=BC. A medida do ângulo CÂB é:
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A) 57,5°
B) 65°
C) 115°
D) 130°
E) 260,5°
A) 57,5°
B) 65°
C) 115°
D) 130°
E) 260,5°
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