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hdt2207
2 năm trước
Hai tiếp tuyến của 1 đường tròn (O) tại A và B cắt nhau ở M,biết góc AMB=50 a) tính số đo của góc ở tâm tạo bởi hai bán kính OA và OB b) tính số đo mỗi AB(cung nhỏ và cung lớn)
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