Question

[Mạnh Tùng Đào]

O la trung diem AB, M nam giua A,B qua M ve day CD \(\perp\)AB. Sao cho : CD=DO=OA=OB lay E doi xung voi A qua M .

a) Tu giac ACED la hinh gi?

b)H,K la hinh chieu M tren AB,AC. CM: \(\dfrac{MH}{HK}.\dfrac{MK}{MC}=\dfrac{CD}{HK}\)