## Half Words Notes

Half Words Notes

Notes on a classroom handout

I often use this activity to start a class. Hand out one copy to each student. Students must then work in pairs to figure out the eight words. Few groups will be able to figure out all the words. Nonetheless students usually like the challenge, and enjoy working together.

I encourage students to explore other shapes they can make by superimposing the designs beyond the ones I originally had in mind. Design 3, in particular, makes many different shapes.

Each design, when assembled properly, makes a perfect inversion. There are three fundamentally different types of symmetries: 180 degree rotational symmetry, reflective symmetry about a horizontal axis, and reflective symmetry about a vertical axis. One word, #7, has to be turned sideways to be read.

Here are the answers: