Triangle
A triangle is a geometric figure with three sides.
Contents
[hide]Introductory topics
- Circles and triangles
- Congruence
- Similarity
- Triangle inequality
- Area
- Angle bisectors
- incircle
- Circumcircle
- Centroid
Resources
Books
Intermediate topics
Resources
Books
- Challenging Problems in Geometry -- A good book for students who already have a solid handle on elementary geometry.
- Geometry Revisited -- A classic.