goal
Reverse engineer a symmetrical letter (A, i, or M) and an asymmetrical letter (E, L, or P). Infer how to engineer any symmetrical or asymmetrical letter. Then, visualize a word. Engineer the letters and connect them to make a concertina word.

Click the letter "d" on any page to return to the start of set D.
STEM Vocabulary
symmetrical | səˈmetrikəl |
adjective
made up of exactly similar parts facing each other or around an axis, or, line of symmetry
concertina |ˌkänsərˈtēnə |
verb
to extend, compress, or collapse in folds
noun
opening or closing in multiple folds