1. 3-1: Congruent Figures
Honors Geometry

2. Congruent Figures Congruent figures have the same size and shape.
Two triangles are congruent iff all pairs of corresponding parts are congruent.
Order of vertices matters when listing congruent figures.

3. Suppose....
Suppose the two triangles above are congruent in the following order:

4. Mark these congruent:
So the two triangles are congruent –

5. Included Angles / Sides
is included by sides and
Side is included by angles A and C.

6. Congruent Polygons
Two polygons are congruent iff all pairs of corresponding parts (sides and angles) are congruent.

7. a postulate
Any segment or angle is congruent to itself. (Reflexive Property).

8. HOMEWORK
3-1 problems.
R & N on 3-2 (including all theorems)