Cho (O,R) A thuoc (O) .Qua A ve tiep tuyen Ax lay M thuoc Ax ve tiep tuyen MB.?

a) chung minh MBOA noi tiep, xac dinh tam duong tron ngoai tiep

b) ve BK vuong goc voi Ax, BK cat MO tai H, chung minh OBHA la hinh thoi

c) tim quy tich diem H khi M di dong tren Ax

em giai dc ai cau dau oi con cai cau c em hok biet lam may anh chi giup gium em voi nha

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