1. Warm Up
∆ABC≅∆RST. Describe a sequence of rigid motion to map ∆ABC to ∆RST A C B R S T
10 minutes
End

2. Answers
∆ABC≅∆RST. Describe a sequence of rigid motion to map ∆ABC to ∆RST A C B R S T
There are many possibilities. One option is:
(x,y) → (x, -y)
Followed by:
(x, y) → (x – 1, y – 2)

3. CPCTC

4. Congruency - Review
Yesterday, we learned that two shapes are congruent if and only if one can be obtained from the other by ___________________________

5. Congruence and Triangles
What can you conclude about two triangles that are congruent? When you know that two triangles are congruent, you can make conclusions about the sides and angles of the triangles.
Resource Manager: Obtain one worksheet for each person
Time Keeper: 10 minutes
Reader/Recorder: Read each question out loud
Spy Monitor: Check in with other groups

6. CPCTC
Corresponding parts of a triangle are the sides and angles that are in the same spot on two triangles.
Corresponding Parts of Congruent Triangles are Congruent (abbreviated as CPCTC) – If two triangles are congruent, then the corresponding sides and corresponding angles are congruent.

7. Using CPCTC Time Keeper: 10 minutes
Reader/Recorder: Read each question out loud
Spy Monitor: Check in with other groups

8. Finish Group Passing Game
On your original poster, write the congruence statement and write all 3 pairs of congruent sides and all 3 pairs of congruent angles.

9. Another Definition
Congruent Polygons are polygons in which all corresponding sides and angles are congruent.
How is this different from similar figures? – mark figures

10. List all corresponding sides
List all corresponding angles
Ca=do, at=og, ct=dg, c=d, a=o, t=g

11. Can draw two triangles to help

12. Homework
Congruent and Triangles Practice