I think she is saying that ABC has a right angle at B. Legs AB and CB are extended past point B to points D and E, respectively, such that <EAC=<ACD=90*. Prove that EB * BD = AB * BC.
I think she is saying that ABC has a right angle at B. Legs AB and CB are extended past point B to points D and E, respectively, such that <EAC=<ACD=90*. Prove that EB * BD = AB * BC.