I need Help plz for only one question rechecking its easy Fo

I need Help plz for only one question rechecking its easy

For question number 34 is it Substitution for BD or is it Transitive Property of Segment Lengths, in Equations (32) and (33)

See my textbook for help

Picture 1: http://imgur.com/a/v2ZKj

Picture 2: http://imgur.com/a/srdcQ

Given: AC BD Prove: CD AB Statements Reasons 30. GIU en Segme it Addition Postulate 31 AC AB BC 32 Substitution for AC 32. AB BC BD 33 Segment tion Postu lat e 33 BD BC CD 34. AB BC Bc CD 34 Substitution for B

Solution

Hi,

It should be substituion property as you have just substituted the value of 32 in 33 to get 34.

So, your answer is right.