In geometrical proofs, what's the difference between segment addition postulate and addition property of equality?

Question

anonymous · Answer

is this for class or your own interest?

masterchief · Answer

Class

masterchief · Answer

Like I want to know when to use which because all I have been using was the first one and then I came across addition property of equality so I was confused.

anonymous · Answer

ok so the segment addition postulate is for line segments..
the addition property of equality is just for adding numbers
ex. 3+2=2+3

masterchief · Answer

In this book it has things like AB + BC = GH
and it says addition property of equality

anonymous · Answer

AB + BC = GH this is for a line segment..
and its using the addition property of equality so be able to proof it

masterchief · Answer

But i thought it was segment addition postulate ?

anonymous · Answer

yes it is

masterchief · Answer

So is the book wrong?

anonymous · Answer

AB + BC = GH 
line segment B

masterchief · Answer

I'm really confused

anonymous · Answer

do you know what a postulate is?