Question

I have to write a 2 column proof and the given is AB=CD, and the thing to prove is AC=BD

Answer 1

what objects are we working with? this is of course not true, in general, for real numbers

Answer 2

\[<----A----B----C----D---->\]

That's what is shown

Answer 3

how ? any more info given?

Answer 4

Well it's a segment proof, and that's pretty much all that is given

Answer 5

well look at this