| Further Questions about Tetrads |
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Tetrads consist of four congruent regions which share boundaries with each of the three others.
An old tetrad from 1971 made of mirror symmetric tiles
This site discusses a recreational geometric puzzle. It is not a scientific publication.
After the introductory questions 1 to 3, the questions 4 to 8 are more autobiographical, and relate my own tetrad story. In the other chapters several old and new tetrads are discussed, mainly tetrads made of congruent polygons with certain properties. Also the construction principles of complicated tetrads are explained.
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A symmetric tetrad with no hole made in February 2020. Two tiles surround the others completely.
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A heptagon tetrad with a quadrilateral hole. The correlations between the angles are noteworthy.
This tetrad was made in February 2020 and consists of four congruent pentagons.
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