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How can we be sure that Pythagoras's theorem is really true? Why is the 'angle in a semicircle' always 90 degrees? And how can ...
For many years, this was the only English-language book devoted to the subject of higher-dimensional geometry. While that is no longer the case, it remains ...
A fun, entertaining exploration of the ideas and people behind the growth of trigonometry
Trigonometry has a reputation as a dry, difficult branch of mathematics ...
