Here is a study sheet I use with my students that lists some important geometry vocabulary words. I give this as a pretest for the unit and we correct as a class. I make sure that I plan a variety of activities that use these words in context.
To download the Geometry Vocabulary Matching Activity pictured above, please visit this post on Artistry of Education.
I am a third generation public school teacher who has been in education since 1987. I have taught elementary students full time for 20+ years. I am also a freelance curriculum writer. You can contact me at mrs.mjbauer(at)gmail(dot)com.