I just finished up a 3 week unit on Geometry. In Virginia we focus on solid shapes, lines and concurrency. While my students don't need to know the vocabulary "acute" and "obtuse" they do need to know what's smaller and larger than a right angle.
One of my favorite activities to do with them is Angle Aerobics. It's an activity from an AIMS book called Shapes, Solids and More. The activity only cost $2 if you're looking to purchase it but you don't necessarily need it. Students use their bodies to show acute, obtuse and right angles. I have them practice standing up and also sitting down.
What resources do you use to teach Geometry?