hsgeometry.club
21 sessions online

A high school geometry course

Geometry, page by page

The sessions cover the whole subject, from points and lines to non-Euclidean geometry. Each session pairs the textbook pages with notes, worked examples, and things to watch.

Twenty-one sessions are online now, covering the first seven chapters and the start of the eighth. The rest are on their way.

chapters 1 to 7 of 16 online, chapter 8 underway

Sessions

  1. 1.1 What Geometry Is Made Of pages 8 to 23
  2. 1.2 Constructions and Doubt pages 24 to 40
  3. 2.1 The Nature of Deductive Reasoning pages 42 to 59
  4. 2.2 Postulates and Famous Theorems pages 60 to 76
  5. 3.1 Equality and the Ruler pages 78 to 90
  6. 3.2 The Protractor and Bisection pages 91 to 104
  7. 3.3 Angle Pairs pages 105 to 116
  8. 3.4 Perpendicular and Parallel pages 117 to 130
  9. 4.1 Coordinates and Polygons pages 132 to 145
  10. 4.2 ASA, SAS, and Proof pages 146 to 156
  11. 4.3 Isosceles and SSS pages 157 to 168
  12. 4.4 Copying and Review pages 169 to 182
  13. 5.1 Inequalities pages 184 to 199
  14. 5.2 The Triangle Inequality pages 200 to 210
  15. 6.1 Symmetry and Parallels pages 212 to 224
  16. 6.2 The Parallel Postulate pages 225 to 241
  17. 6.3 AAS, HL, and Review pages 242 to 256
  18. 7.1 Quadrilaterals pages 258 to 269
  19. 7.2 The Quadrilateral Family pages 270 to 285
  20. 7.3 The Midsegment Theorem pages 286 to 296
  21. 8.1 Transformations pages 298 to 311
  22. 09 Area in preparation
  23. 10 Similarity in preparation
  24. 11 The right triangle in preparation
  25. 12 Circles in preparation
  26. 13 The concurrence theorems in preparation
  27. 14 Regular polygons and the circle in preparation
  28. 15 Geometric solids in preparation
  29. 16 Non-Euclidean geometries in preparation