Often in the back of a Geometry textbook there is a list of Postulates and Theorems. These 
lists can be useful for review and reference. Here are some useful reference sheets I found on the web. My Top Two are pages 59-64 of the “Contents of Student Resources” and the 6-page Mathematics Reference Sheet from Big Ideas Math.
Contents of Student Resources – 122-page PDF of references and resources from the Geometry textbook by Ron Larson, Laurie Boswell, Timothy D. Kanold, Lee Stiff (2007).
- Postulates and Theorems are on pages 59-64 of the the PDF. A very nice listing.
- View the whole book here. If you go to “Chapter 1-2” the Table of Contents for the book is on pages 8-19 of the PDF.
High School AIMS Reference Sheet – from the Arizona Department of Education. (2 
pgs.)
Wisconsin Mathematics Formula Reference Sheet 2 pages similar to Arizona (or my version)
Big Ideas Math: Geometry – Free Easy Access Student Edition. (Other textbooks here.)
- Mathematics Reference Sheet – nice with visuals (6 pgs)
- Postulates and Theorems (similar to Postulates and Theorems above)
Glossaries
I’m still looking for a glossary I really like. Pretty comprehensive with pictures. Here are a couple that are pretty good:
- Geometric Terms – from Aplus Math Varsity Tutors.
- Geometry Glossary – from CliffsNotes
