WT58: Triangle spread rules
The three spreads of a triangle satisfy the Triple spread formula, and given two such spreads this gives a quadratic equation for the third. The Triangle spread rules give information about which of the two solutions of this quadratic equation to take in particular circumstances. The notion of sector is introduced, along with notions of acute and obtuse. This video is part of the WildTrig series, which introduces Rational Trigonometry and applies it to many different aspects of geometry.