Lecture 8 (Geometry) Congruent Angles

According to the lecture, all congruencies in geometry ultimately reduce to which two kinds?

1. A.Segments being congruent and angles being congruent.
2. B.Segments being congruent and triangles being congruent.
3. C.Angles being congruent and polygons being congruent.
4. D.Triangles being congruent and polygons being congruent.