hsgeometry.club
7 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.

Seven sessions are online now, covering the first three chapters. The rest are on their way.

chapters 1 to 3 of 16 online

Sessions

  1. 01 What geometry is made of pages 8 to 23
  2. 02 The nature of deductive reasoning pages 42 to 59
  3. 03 Postulates and famous theorems pages 60 to 76
  4. 04 Equality and the ruler pages 78 to 90
  5. 05 The protractor and bisection pages 91 to 104
  6. 06 Angle pairs pages 105 to 116
  7. 07 Perpendicular and parallel pages 117 to 130
  8. Congruence in preparation
  9. Inequalities in preparation
  10. Parallel lines in preparation
  11. Quadrilaterals in preparation
  12. Transformations in preparation
  13. Area in preparation
  14. Similarity in preparation
  15. The right triangle in preparation
  16. Circles in preparation
  17. The concurrence theorems in preparation
  18. Regular polygons and the circle in preparation
  19. Geometric solids in preparation
  20. Non-Euclidean geometries in preparation