Question

I'm not completely sure on this one?
Photo in comments.

Answer 1

I've tried it an it just doesn't make sense to me.
If someone could just explain it to me. I don't want you to give me to answer.

Answer 2

What part doesn't make sense? Like, does it not make sense what they're doing, or just thinking of the name of the property?

Answer 3

I just started in Geometry and nothing makes sense. I can't think of the properties.

Answer 4

This is one of the ugliest web pages I have ever seen.
However, it does have a nice list of properties.
http://www.coolmath.com/prealgebra/06-properties/index.html

Answer 5

Thank you so much! I really appreciate it. I sucked at properties in Algebra1, but this should help a lot. :) Thanks again.