Dihedral A natural mirror-image ambigram consisting of numerical digits. Sometimes chain ambigrams are presented in the form of a circle. Letters are usually overlapped meaning that a word will start partway through another word. Chain A design where a word (or sometimes words) are interlinked, forming a repeating chain.
Such designs can be generated using constructive solid geometry. Ambigrams usually fall into one of several categories: 3-Dimensional A design where an object is presented that will appear to read several letters or words when viewed from different angles. Some ambigrams feature a relationship between their form and their content. Ambigrams are exercises in graphic design that play with optical illusions, symmetry and visual perception.
