Trisecting a Right Triangle
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Video Lecture 68 of 72
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### Lecture Description

In this video lecture, Prof. N.J. Wildberger talks about trisecting a right triangle.

We analyse the third problem from our Quiz #2 (Lecture 63: Rational Trigonometry Quiz #2). This problem studies a right triangle which has one vertex trisected, and for which we know two of the three lengths into which the opposite side has been divided. We are asked to find the length of the third segment.The second and third spread polynomials figure prominently in the solution.

This video is part of the WildTrig series, which introduces Rational Trigonometry and applies it to many different aspects of geometry.

### Course Description

In this course, Prof. N.J. Wildberger gives 72 video lectures on Rational Trigonometry.

This video series on Rational Trigonometry (RT) and related geometry presents a much needed alternative to the traditional tedious and painful subject of trigonometry, which alienates millions of students each year from mathematics. By dispensing with transcendental notions, circular functions and square roots, this new theory gives simpler, faster and more accurate ways to solve a wide variety of engineering, surveying, physics and geometry problems, essentially only with high school algebra (that's right, calculators or trig tables are not required). RT is also a much more satisfying and logical way to introduce young people to the beauty and elegance of geometry, and teaches them that mathematics should, first and foremost, always make sense. Prepare to depart on a modern adventure, in the spirit of the ancient Greeks! Assoc Prof N J Wildberger is the author of the first book on this subject, 'Divine Proportions: Rational Trigonometry to Universal Geometry'. He is also and innovative and highly regarded teacher in the School of Mathematics and Statistics at UNSW.