Question

如果AB向量×CD向量=0,AB向量×EF向量=0,那么CD向量的模等于EF向量的模?

Answer 1

CD向量的模等于EF向量的模:不

e.g

AB= (0,1) ,CD = (2,0),EF = (3,0)

AB.CD =0

AB.EF =0

|CD|=2,|EF| =3