Chapter 13 — Triangle Centers and Circles
This chapter is split into one page per lesson, based on the teaching plan’s terms and concepts.
Lesson one-pagers
| Lesson | Topic | One-pager |
|---|---|---|
| 1 | Triangles and Circles | Open |
| 2 | Cyclic Quadrilaterals | Open |
| 3 | Incircles | Open |
| 4 | The Centroid of a Triangle | Open |
| 5 | Ceva’s Theorem | Open |
| 6 | Napoleon’s Discovery and Other Surprises | Open |
What each one-pager contains
- Words to know
- Concepts to know
- Formulas / rules
- Homework helper
- Watch out
- Check
Chapter 13 in one sentence
Circles meet triangles at the circumcenter and incenter; medians meet at the centroid, cevians have Ceva’s condition, and special constructions produce surprising equilateral triangles.