flexagon
/ˈflɛksəˌɡɑn/
noun
- A folded paper shape that can be turned inside out to show different faces or patterns.
- I folded a flexagon from a strip of paper and decorated each side with different stickers.
- The children made a colorful flexagon in art class and were amazed when it flipped to reveal new designs.
- The math teacher used a flexagon to demonstrate geometric transformations.