Plane-euclidean-geometry-theory-and-problems-pdf-free !!top!!-47 (Popular • STRATEGY)
The Adventures of Geo and his Friends
Triangle Congruence:
The criteria (SSS, SAS, ASA, AAS, HL) that determine if two triangles are identical in shape and size.
- Definitions and constructions: centroid, circumcenter, incenter, orthocenter.
- Properties and relationships: Euler line, nine-point circle.
- Proofs: centroid divides medians 2:1; circumcenter as intersection of perpendicular bisectors; incenter as intersection of angle bisectors.