Muhammad Musa al-Khuwarizmi discovered Algebra when he observed the squares of tiles on floors. To this day, we call roots in English "square roots." It is likely that the advances in Mathematics and Algebra--for example--derive from the master building craftspeople. Al-Kashi studied decorative arches to explain calculation of the surface area: calculus before the Europeans like Descartes. Throughout this progress, we note the influence of the individual's walking in the street. We observe that the engineers designed the buildings in the street so that they appear to move as you walk. (Arabic below)

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