... hinh hpc khong gian phang (p) hoSc viet tat la mp(P), mp(Q), m p ( a ) , m p ( p ) , ho|c (P), (Q), Chuong I I : Quan h^ song song khong gian Chuang I I I : Quan h$ vuong goc khong gian {«)'(P)- ... i(;iy.'ii':i.> nr.? v f i c , * n Cni/ONG I D A I CUONG nlNH H Q C KHONG GIAN Buoc dau tien lam quen voi H m h hpc khong gian, cac b^n cac b^n phki nho ky cac khai ni^m va nhung tinh chat sau sau: ... SONG SONG TRONG KHONG GIAN HAI Dl/ONG THANG CHEO NHAU V A HAI DI/6NG T H A N G S O N G Tinh chat: Dinh If 1: SONG BinhJiJ: Neu duong thiing d khong nam Jf.'- Trong khong gian, qua mpt diem khong...