What is geometry really about? Is it pictures or visual patterns? Or constructions? Or simply theorems? In this lecture, we suggest that geometry is, at its heart, actually something else... We will also have a look at a lovely result for four collinear points, generalizing the Triple quad formula, and related to Brahmagupta's area formula for cyclic quadrilaterals. This video is part of the WildTrig series, which introduces Rational Trigonometry and applies it to many different aspects of geometry.
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