CCho tam giac MNP co MN < MP. Tren MP lay B sao cho MB=MN. Lay O lam trung diem cua NB. a)cmr:∆MNO=∆MBO.
b)keo MO cat NP tai A , cm AN=AB
C)duong thang qua P song song voi NB cat MO tai H cat MN keo dai tai C . cm: MA vuong goc voi CP va MC = MP
D)cm: ba diem B,A,C thang hang!
Loga
Sinh Học lớp 12
