1. Section Name: CPCTC Proofs
Warm-up
What were our steps for a proof?
Section Name: CPCTC Proofs

2. Once we prove two triangles are congruent.
There are six pairs of congruent sides/angles.
3 pairs of sides 1. 2. 3.
3 pairs of angles

4. Given: Isosceles ∆𝐴𝐵𝐶
∠𝐴𝐷𝐵≅∠𝐶𝐷𝐵
∠𝐴𝐵𝐷≅∠𝐷𝐵𝐶
Prove: Properties of
Isosceles Triangles

6. Given: ∠𝐴≅∠𝐷
∠𝐴𝐵𝐶≅∠𝐷𝐵𝐶
Prove: The two sides of isosceles
triangle ∆𝐴𝐵𝐷 are congruent

8. Exit Ticket
Which property of isosceles triangles are we trying to prove?
Complete the proof.
Given: 𝐴𝐵 ≅ 𝐷𝐵
𝐶 𝑖𝑠 𝑡ℎ𝑒 𝑚𝑖𝑑𝑝𝑜𝑖𝑛𝑡 𝑜𝑓 𝐴𝐷
Prove: ∠𝐴≅∠𝐷

9. Section Name: Review Day 1
Warm-up
What were our steps for a proof?
Section Name: Review Day 1