Geo Quiz. You have 20 min. 1. Find mABD. 2. Find mN and mP. 3. The diagram is a map showing John's house, Kay's house, and the grocery store. What is the angle the two houses make with the store?

Homework Questions???

4.3 Congruent Triangles

What Standard will I learn? What will I be able to do? Prove triangles congruent What Standard will I learn? 5.0 Students prove triangles are congruent

corresponding parts are congruent When you write a statement such as ABC  DEF, you are also stating which parts are congruent. Helpful Hint

If Δ ABC is  to Δ XYZ, which angle is  to C? Which side is  to XZ? Ex 1 If Δ ABC is  to Δ XYZ, which angle is  to C? Which side is  to XZ? <C  Z XZ  AC

Ex 2: A B C D E C  Are the two triangles above congruent? If so, write a congruence statement? Yes the triangles are congruent because all the corresponding angles and corresponding sides are congruent. A B C D E C 

Theorem 4.3

Ex 3: find x ) )) ) 22o 22o )) 87o 87o (4x+15)o

Theorem 4.4 Reflexive prop of Δ  ΔABC  ΔABC. Symmetric prop of Δ  If ΔABC  ΔPQR, then ΔPQR  ΔABC. Transitive prop of Δ  If ΔABC  ΔPQR & ΔPQR  ΔXYZ, then ΔABC  ΔXYZ.

SUMMARY

CLASSWORK HOMEWORK Pages 258- 262 #’s 2, 4, 6, 10 – 20 even, 39