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WT47: Red geometry (II)

We give some examples of calculating quadrances and spreads in red geometry, and illustrating some of the usual laws of rational trigonometry. The concurrence of the red circumcenter, centroid and orthocenter on the `red Euler line' is shown in a special case. This video is part of the WildTrig series, which introduces Rational Trigonometry and applies it to many different aspects of geometry.
Length: 10:00


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