Rational Trigonometry/A

Available as a playlist https://www.youtube.com/playlist?list=PL3C58498718451C47


 * Rational Trigonometry/0 - An invitation to Geometry
 * 1) Rational Trigonometry/1 - Intro to Rational Trigonometry
 * 2) Rational Trigonometry/2 - Quadrance via Pythagoras and Archimedes
 * 3) Rational Trigonometry/3 - Spread, Angles, and Astronomy
 * 4) Rational Trigonometry/4 - Five Main Laws of Rational Trigonometry
 * 5) Rational Trigonometry/5 - Applications of Rational Trigonometry
 * 6) Rational Trigonometry/6 - Heron's Formula Viewed Rationally
 * 7) Rational Trigonometry/7 - Solving Triangles with Rational Trigonometry
 * 8) Rational Trigonometry/8 - Centers of Triangles with Rational Trigonometry
 * 9) Rational Trigonometry/9 - Laws of Proportion for a Triangle
 * 10) Rational Trigonometry/10 - Geometry of Circles with Rational Trigonometry
 * 11) Rational Trigonometry/11 - Applications of Rational Trigonometry to Surveying (I)
 * 12) Rational Trigonometry/12 - Cartesians Coordinates and Geometry
 * 13) Rational Trigonometry/13 - Why Spreads are Better than Angles